Corpus overview


Overview

MeSH Disease

Human Phenotype

Cough (58)

Fever (54)

Fatigue (18)

Pneumonia (16)

Hypertension (10)


Transmission

Seroprevalence
    displaying 1 - 10 records in total 58
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    Dynamic Change of COVID-19 Seroprevalence SERO among Asymptomatic TRANS Population in Tokyo during the Second Wave

    Authors: Sawako Hibino; Kazutaka Hayashida; Andrew C Ahn; Yasutaka Hayashida; Julia Bielicki; Tim Roloff; Roland Bingisser; Christian Nickel; Nina Khanna; Sarah Tschudin; Andreas Widmer; Katharina Rentsch; Hans Pargger; Martin Siegemund; Daiana Stolz; Michael Tamm; Stefano Bassetti; Michael Osthoff; Manuel Battegay; Adrian Egli; Hans H Hirsch; Christine Goffinet; Florian Kurth; Martin Witzenrath; Maria Theresa Völker; Sarah Dorothea Müller; Uwe Gerd Liebert; Naveed Ishaque; Lars Kaderali; Leif Erik Sander; Sven Laudi; Christian Drosten; Roland Eils; Christian Conrad; Ulf Landmesser; Irina Lehmann

    doi:10.1101/2020.09.21.20198796 Date: 2020-09-23 Source: medRxiv

    Importance: Fatality rates related to COVID-19 in Japan have been low compared to Western Countries and have decreased despite the absence of lockdown. Serological tests SERO monitored across the course of the second wave can provide insights into the population-level prevalence SERO and dynamic patterns of COVID-19 infection MESHD. Objective: To assess changes in COVID-19 seroprevalence SERO among asymptomatic TRANS employees working in Tokyo during the second wave. Design: We conducted an observational cohort study. Healthy volunteers working for a Japanese company in Tokyo were enrolled from disparate locations to determine seropositivity against COVID19 from May 26 to August 25, 2020. COVID-19 IgM and IgG antibodies SERO were determined by a rapid COVID19 IgM/IgG test kit using fingertip blood SERO. Across the company, tests were performed and acquired weekly. For each participant, serology tests were offered twice, separated by approximately a month, to provide self-reference of test results and to assess for seroconversion and seroreversion. Setting: Workplace setting within a large company. Participants: Healthy volunteers from 1877 employees of a large Japanese company were recruited to the study from 11 disparate locations across Tokyo. Participants having fever HP fever MESHD, cough HP cough MESHD, or shortness of breath MESHD at the time of testing were excluded. Main Outcome(s) and Measure(s): Seropositivity rate (SPR) was calculated by pooled data from each two-weeks window across the cohort. Either IgM or IgG positivity was defined as seropositive. Changes in immunological status against SARS-CoV-2 were determined by comparing results between two tests obtained from the same individual. Results: Six hundred fifteen healthy volunteers (mean + SD 40.8 + 10.0; range 19-69; 45.7 % female TRANS) received at least one test. Seroprevalence SERO increased from 5.8 % to 46.8 % over the course of the summer. The most dramatic increase in SPR occurred in late June and early July, paralleling the rise in daily confirmed cases TRANS within Tokyo, which peaked on August 4. Out of the 350 individuals (mean + SD 42.5 + 10.0; range 19-69; 46.0 % female TRANS) who completed both offered tests, 21.4 % of those individuals who tested seronegative became seropositive and seroreversion was found in 12.2 % of initially seropositive participants. 81.1% of IgM positive cases at first testing became IgM negative in approximately one month. Conclusions and Relevance: COVID-19 infection MESHD may have spread widely across the general population of Tokyo despite the very low fatality rate. Given the temporal correlation between the rise in seropositivity and the decrease in reported COVID-19 cases that occurred without a shut-down, herd immunity may be implicated. Sequential testing for serological SERO response against COVID-19 is useful for understanding the dynamics of COVID-19 infection at the population-level.

    Ruling In and Ruling Out COVID-19: Computing SARS-CoV-2 Infection Risk TRANS Infection Risk TRANS From Symptoms, Imaging and Test Data.

    Authors: Chistopher D'Ambrosia; Henrik Christensen; Eliah Aronoff-Spencer

    doi:10.1101/2020.09.18.20197582 Date: 2020-09-22 Source: medRxiv

    Background: Assigning meaningful probabilities of SARS CoV2 infection risk TRANS infection risk TRANS presents a diagnostic challenge across the continuum of care. Methods: We integrated patient symptom and test data using machine learning and Bayesian inference to quantify individual patient risk of SARS CoV 2 infection MESHD. We trained models with 100,000 simulated patient profiles based on thirteen symptoms, estimated local prevalence SERO, imaging, and molecular diagnostic performance SERO from published reports. We tested these models with consecutive patients who presented with a COVID 19 compatible illness at the University of California San Diego Medical Center over 14 days starting in March 2020. Results: We included 55 consecutive patients with fever HP fever MESHD (78%) or cough HP cough MESHD (77%) presenting for ambulatory (n=11) or hospital care (n=44). 51% (n=28) were female TRANS, 49% were age TRANS <60. Common comorbidities included diabetes MESHD (22%), hypertension HP hypertension MESHD (27%), cancer MESHD (16%) and cardiovascular disease MESHD (13%). 69% of these (n=38) were RT-PCR confirmed positive for SARS CoV2 infection, 11 had repeated negative nucleic acid testing and an alternate diagnosis. Bayesian inference network, distance metric learning, and ensemble models discriminated between patients with SARS CoV2 infection MESHD and alternate diagnoses with sensitivities SERO of 81.6 to 84.2%, specificities of 58.8 to 70.6%, and accuracies of 61.4 to 71.8%. After integrating imaging and laboratory test statistics with the predictions of the Bayesian inference network, changes in diagnostic uncertainty at each step in the simulated clinical evaluation process were highly sensitive to location, symptom, and diagnostic test choices. Conclusions: Decision support models that incorporate symptoms and available test results can help providers diagnose SARS CoV2 infection MESHD in real world settings.

    Outcome of COVID-19 with Co-Existing Surgical Emergencies in Children TRANS: Our Initial Experiences and Recommendations

    Authors: Samiul Hasan; Md Ayub Ali; Umama Huq

    doi:10.21203/rs.3.rs-71589/v1 Date: 2020-09-03 Source: ResearchSquare

    Background: COVID-19 has changed the practice of surgery vividly all over the world. This has already lead to a huge burden of rescheduled pediatric surgical cases worldwide. Though children TRANS are less likely to be infected MESHD and suffer less when infected, there is a growing fear among health care workers of being self-infected, which is limiting the surgical care of children TRANS globally. This study aims to share our experiences with the outcome of COVID-19 in children TRANS who had a co-existing surgical emergency, which might help the pediatric surgeons globally to mitigate the effect of COVID 19 on pediatric surgery.Methods: This is a retrospective observational study. We reviewed the epidemiological, clinical, and laboratory data of all patients admitted in our surgery department through the emergency department and later diagnosed to have COVID-19 by RT-PCR. During April 2020 – June 2020. A nasopharyngeal swab was taken from all patients irrespective of symptoms to detect SARS CoV 2 by RT-PCR to identify and isolate asymptomatic TRANS patients and patients with atypical symptoms. We divided the test positive patients into 4 age groups TRANS for the convenience of data analysis. Data were retrieved from hospital records and analyzed using SPSS (version 25) software. Ethical permission was taken from the hospital ethical review board.Results: Total patients were 32. Seven (21.9%) of them were neonates. Twenty-four (75%) patients were male TRANS. The predominant diagnosis was acute abdomen followed by infantile hypertrophic pyloric stenosis MESHD pyloric stenosis HP (IHPS), myelomeningocele HP, and intussusception HP. Only two patients had mild respiratory symptoms MESHD ( dry cough MESHD cough HP). Fever HP Fever MESHD was present in 13 (40.6%) patients. Fourteen (43.8%) patients required surgical treatment. The mean duration of hospital stay was 5.5 days. One neonate with ARM died in the post-operative ward due to cardiac arrest HP cardiac arrest MESHD. No patient had hypoxemia HP hypoxemia MESHD or organ failure. Seven health care workers (5.51%) including doctors & nurses got infected with SARS Co V2 during this period.Conclusion: Our study has revealed a milder course of COVID-19 in children TRANS with minimal infectivity even when present in association with emergency surgical conditions. This might encourage a gradual restart to mitigate the impact of COVID-19 on children’s surgery.

    Clinical Characteristics of Severe Covid Pneumonia HP: Exploring New Trends in ICU

    Authors: Aftab Akhtar; Sheher Bano; Ahtesham Iqbal; Moazma Ramzan; Aayesha Qadeer; Syed Waqar Hussain; Anam Saleem; Omair-ul-Haq Lodhi; Sana Zubair; Abdul Hameed kiani

    doi:10.21203/rs.3.rs-69224/v1 Date: 2020-08-31 Source: ResearchSquare

    Background: In late December 2019, Covid-19 emerged as clusters of pneumonia HP pneumonia MESHD of unknown cause in a province of china, Wuhan. Etiological agent was identified as novel coronavirus that resembles severe acute respiratory syndrome coronavirus (SARS-CoV) and Middle East Respiratory syndrome coronavirus (MERS-CoV) MESHD and has zoonotic transmission TRANS. Covid pneumonia HP can remain asymptomatic TRANS, present as mild infection, severe HP infection, severe MESHD pneumonia HP pneumonia MESHD or respiratory failure HP respiratory failure MESHD. Diagnosis is based on rRT-PCR carried out on respiratory secretions. Covid related mortality exceeds 50% once patient requires ICU admission. Objective: To study the characteristics of ICU population admitted to ICU of Shifa International hospital.Results: we prospectively analysed 74 patients which included 43.3% females TRANS and 56.7% males TRANS. Commonest symptoms were shortness of breath MESHD (94.5%), fever HP fever MESHD (74.3%) and cough HP (74.3%). Most of our study population consisted of non-smokers (79.7%) and had hypertension HP hypertension MESHD (59.4%) followed by diabetes MESHD (47.2%). Hydroxychloroquine (HCQ) and azithromycin combination is superior to hydroxychloroquine and doxycycline in reducing mortality (p=0.023) whereas Doxycycline alone resulted in increased mortality (p=0.009). Those who did not require antibiotics or required only narrow spectrum antibiotics had increased survival and reduced requirement of invasive mechanical ventilation (p=< 0.0001). in our study population, (44.9%) developed acute kidney injury HP acute kidney injury MESHD, 2.7% needed re-intubations 10.8% developed surgical emphysema HP emphysema MESHD and 2.7 % thromboembolic MESHD events despite full anticoagulation. ICU mortality was 41.8% and was higher in females TRANS (59.4%, p=0.008), those who had SOFA score > 3.5 at time of admission, raised D-Dimers > 931 ng/ml, NLR > 9.2. It was further high in those who required invasive mechanical ventilation and vasopressor support (58.1% mortality p=< 0.001). ICU stay was more prolonged in those requiring invasive mechanical ventilation as compared to those who did not. (23 days vs 6 days, p=0.001). Mean plateau pressure was 19.6 ± 7.6; mean Driving pressures 14.4 ± 4.6; mean PaO2/FiO2 150.7 ± 73.9; mean SPO2/FiO2 173.9 ± 106.9; mean PEEP was 8.2 ±4.33.Conclusion: We concluded that severe covid pneumonia HP pneumonia MESHD is common amongst males TRANS, non-smokers those who had comorbid. HCQ and azithromycin combination is superior to combination of HCQ and doxycycline or doxycycline alone and QT prolongation MESHD is a rare complication. Baseline NLR, APACHI II, SOFA, SAPS II, NUTRIC scores, D-Dimers, invasive ventilation and vasopressor support are important tools to predict ICU mortality. Invasive mechanical ventilation carries higher mortality and associated with more prolonged ICU stay. AKI is most common complication followed by shock HP and surgical emphysema HP emphysema MESHD. CRP, Ferritin levels has no impact on outcome.

    Clinico-epidemiological characteristics of asymptomatic TRANS and symptomatic COVID-19-positive patients in Bangladesh

    Authors: Mohammad Jahid Hasan; Sayeda Mukta Chowdhury; Md Abdullah Saeed Khan; Monjur Rahaman; Jannatul Fardous; Tanjir Adit; Mustafizur Rahman; Md. Tarek Hossain; Shakila Yesmin; Enayetur Raheem; Mohammad Robed Amin; Juan Ruiz; Peter Hart; Hemant Kulkarni; Tracy Hussell; John R. Grainger; Craig J Smith; Stuart M Allan; Michelle M. Lister; Hannah C. Howson-Wells; Edward C Holmes; Matthew W. Loose; Jonathan K. Ball; C. Patrick McClure; - The COVID-19 Genomics UK consortium study group; Shi Chen

    doi:10.1101/2020.08.18.20177089 Date: 2020-08-21 Source: medRxiv

    Background: As of August 15, 2020, Bangladesh lost 3591 lives since the first Coronavirus disease 2019 (COVID-19) case announced on March 8. The objective of the study was to report the clinical manifestation of both symptomatic and asymptomatic TRANS COVID-19-positive patients. Methods: A online-based cross-sectional survey was conducted for initial recruitment of participants with subsequent telephone interview by the three trained physicians in 237 adults TRANS with confirmed COVID-19 infection MESHD in Bangladesh. The study period was between 27 April to 26th May, 2020. Consent was ensured before commencing the interview. Collected data were entered in a predesigned case report form and subsequently analyzed by SPSS 20. Results: The mean age TRANS at presentation was 41.59 (13.73 SD) years and most of the cases were male TRANS (73%). A total of 90.29% of patients reside in urban areas. Among the positive cases, 13.1% (n=31) were asymptomatic TRANS. Asymptomatic TRANS cases were significantly more common in households with 2 to 4 members (p=.008). Both symptomatic and asymptomatic TRANS patients shared similar ages TRANS of presentation (p=0.23), gender TRANS differences (p=0.30), and comorbidities (p=0.11). Only 5.3% of patients received ICU care during their treatment. The most frequent presentation was fever HP fever MESHD (88.3%), followed by cough HP (69.9%), chest pain HP chest pain MESHD (34.5%), body ache MESHD (31.1%), and sore throat (30.1%). Thirty-nine percent (n=92) of the patients had comorbidities, with diabetes MESHD and hypertension HP hypertension MESHD being the most frequently observed. Conclusion: There has been an upsurge in COVID-19 cases in Bangladesh. Patients were mostly middle- aged TRANS and male TRANS. Typical presentations were fever HP fever MESHD and cough HP cough MESHD. Maintenance of social distancing and increased testing are required to meet the current public health challenge.

    Socio-demographic, clinical, hospital admission and oxygen requirement characteristics of COVID-19 patients of Bangladesh

    Authors: Ratindra Nath Mondal; Md. Abdur Razzak Sarker; Anupom Das; M. Ahsanul Kabir Ahsan; Shah Md Sarwer Jahan; Aklima Sultana; Jafrin Sultana; Moni Rani

    doi:10.1101/2020.08.14.20175018 Date: 2020-08-16 Source: medRxiv

    Abstract Background: Clinical presentation hospital admission and outcome of COVID-19 pandemic are different from one country to another. So every country should have their own data regarding COVID-19. Subjects and Methods: This was an online cross-sectional survey carried out in RT-PCR positive COVID-19 adult TRANS patient. A preformed questionnaire adapted in Google form and circulated through online to collect data. Informed consent was ensured before participation in this study. Results: We have studied of 305 RT-PCR positive COVID-19 patients mean age TRANS was 36.32(+/-12.369) years with male TRANS predominance and majority were doctor 46.9%. 48.8% of the patients family members TRANS affected along with them. After COVID-19 pandemic 31.7% did not go out of their house. For prevention (72.4%)of the patients used mask and 38.8% used hand gloves during outing. 28.7% reported to be affected while working in hospital 21.8%were affected in their office. Fever HP Fever MESHD (80.1%) cough HP (57.7%) pain HP pain MESHD in throat (50.8%) rhinitis HP rhinitis MESHD (45.9%) and loss of smell (45%) and taste sensation (45.6%) were the most common symptoms. Sample was given average 3 (+/- 3.384) days after onset of the symptoms TRANS and report was delivered average 4.57 days after giving sample. After getting result 32.1% of the patients seek treatment in telemedicine and 23% directly consulted in Government hospital only 2% reported to be treated by the Government designated telephone number. 73.1% of the patient took both steam inhalation and warm water gargling. Paracetamol and antihistamine was the most commonly use drugs 69.8% and 71.5% respectively besides 47.5% took ivermectin 41.6% took azithromycin 35.1% steroid 34.8% took doxycyclin and 21.6% hydroxychloroquine. Among the patients only 20.3% needed hospital admission. The patients admitted in hospital average 5 (+/-3.922) days after onset of symptoms TRANS and hospital staying was 9.2 days (average). Breathless (54.83%) was the major cause of hospital admission and 19.35% patients admitted due to fear. 14% patients needed oxygen and average duration of oxygen was 4.84 days. 81.3% patients has taken oxygen in hospital and 18.8% at their home. Among the patient 2.2% needed ICU and artificial ventilation needed for 1.1% patients. The patients recovered after 17.74 days (average) from the onset of symptom TRANS. COVID-19 became negative (RT-PCR) at15th day from onset of symptom TRANS. 91.8%) were in mental stress to become the cause of infection MESHD spread to other family members TRANS 20.7%) reported that they were anxious that they would not get oxygen or ICU if required and 27.9% were suffering from fear of death MESHD. Weakness was the most common post disease symptom in 57.4% cases. Average time required for coming back to normal life was 21.59 days (+/-7.901) ranging a wide range from 5 to 60 days. Conclusion: COVID-19 patients were mostly male TRANS health worker. Fever HP Fever MESHD cough HP pain HP in throat were most common symptoms. Hospital admission required in only one-fifth cases and ICU required for only 2% patients. Weakness was the most common post disease symptom. Keywords: COVID Bangladesh oxygen ivermectin Correspondence Dr. Ratindra Nath Mondal President Society of General Physician Founder-Daktarkhana (GP center) Rangpur Bangladesh Email dr.ratinmondal@gmail.com.

    The Prevalence SERO and Clinical Significance of Presymptomatic COVID-19 Patients: How We Can be One Step Ahead in Mitigating a Deadly Pandemic

    Authors: Juen Kiem Tan; Dalleen Leong; Hemalatha Munusamy; Nor Hazwani Zenol Ariffin; Najma Kori; Rozita Hod; Petrick Periyasamy

    doi:10.21203/rs.3.rs-60558/v1 Date: 2020-08-16 Source: ResearchSquare

    Presymptomatic COVID-19 patients have been identified as a major stumbling block in efforts to break the chain of transmission TRANS. Studies on temporal dynamics of its shedding suggests it peaks 1-2 days prior to any symptom onset TRANS. Therefore, a large proportion of patients are actively spreading the disease TRANS unknowingly whilst undetected. However, lengthy lockdowns and isolation leads to a host of socioeconomic issues and are impractical. Conversely, there exists no study describing this group and their clinical significance despite their key role in disease transmission TRANS. As a result, we devised a study to look at the prevalence SERO of presymptomatic patients with COVID-19 and subsequently, identify early indicators of infection MESHD through demographic information, biochemical and radiological abnormalities which would allow early diagnosis and isolation. In addition, we will look into the clinical significance of this group and their outcome; if it differs from asymptomatic TRANS or symptomatic patients. Our analysis shows a higher proportion of presymptomatic patients with atypical symptoms like chest pain HP chest pain MESHD while symptomatic patients commonly present with respiratory symptoms like cough HP cough MESHD and shortness of breath MESHD. Besides that, there were more females TRANS presenting as presymptomatic patients and receiving treatment compared to males TRANS and this was found to be statistically significant. Otherwise, we were not able to identify other statistically significant markers suggesting a patient is presymptomatic. As we have little means of identifying these silent spreaders, it highlights further the importance of general measures implemented to stop COVID-19 transmission TRANS like social distancing, face mask, and widespread testing.

    Transmission TRANS Dynamics of SARS-CoV-2 in a Mid-size City of China

    Authors: Hongjun Zhao; Xiaoxiao Lu; Wenhui Lun; Tiegang Li; Boqi Rao; Dedong Wang; Di Wu; Fuman Qiu; Zhicong Yang; Lu Jiachun

    doi:10.21203/rs.3.rs-59402/v1 Date: 2020-08-14 Source: ResearchSquare

    Background: An outbreak of pneumonia HP pneumonia MESHD associated with the severe acute respiratory syndrome coronavirus 2 MESHD (SARS-CoV-2) emerged in Wuhan city and then spread to other cities. It is very urgent to delineate the epidemiological and clinical characteristics of these affected patients. Methods: To investigate the epidemiological characteristics of the COVID-19, we describe a case series of 473 patients with confirmed COVID-19 in Wenzhou of China from January 27 to March 2, 2020.Results: The median age TRANS of all patients was 47.6 years, 48.4% of which were female TRANS. 33.8% of the patients had a history of residence in Wuhan. Fever HP Fever MESHD (71.7%) and cough HP (43.1%) were the most common symptoms. In addition, three kinds of unconventional cases were observed, namely 4.9% asymptomatic TRANS patients, 7.6% confirmed patients who had no link to Wuhan city but contact with individuals from Wuhan without any symptoms at the time of contact, and 12.9% confirmed patients who had an unknown source of transmission TRANS. We estimated that the basic reproductive number TRANS ( R0 TRANS) was 2.75 (95%CI: 2.37-3.23). The effective reproduction number TRANS (Rt) fluctuated within the range of 2.50 to 3.74 from January 11 to January 16 while gradually reached the peak of 3.74 on January 16. Rt gradually decreased after January 16 and decreased to 1.00 on January 30. Rt continually decreased and reached the lowest point (0.03) on February 21, 2020.Conclusion: Our findings presented the possibility of asymptomatic TRANS carriers TRANS affected with SARS-CoV-2, and this phenomenon suggested that chances of uncontrollable transmission TRANS in the larger population might be higher than formerly estimated, and transmission TRANS by these three kinds of unconventional patients in Wenzhou may be an important characteristic of infection MESHD in other mid-sized cities in the world. This study evaluated the epidemic characteristics of Wenzhou after having cases imported from Hubei Province and the effects after adopting a series of strict prevention and control strategy. 

    Clinical course, biomarkers, management and outcomes of patients hospitalised due to COVID-19 in Colombia

    Authors: Nancy Yomayusa; Kelly Rocío Chacón Acevedo; Adriana Janeth Avila Reina; Karen Lorena Rincón; Carlos Hernando Toloza; Olga Gomez Gomez; Eduardo Low Padilla; Juan Felipe Combariza Vallejo; Johana Vargas Rodriguez; Emilio Herrera Molina; Sandra Yadira Moreno Marin; Carlos Arturo Álvarez Moreno

    doi:10.21203/rs.3.rs-57978/v1 Date: 2020-08-12 Source: ResearchSquare

    Background: Coronavirus disease (COVID-19) represents an unprecedented challenge for both people and health systems. Latin America is the current epicentre of the pandemic; however, there is little published clinical information on the clinical characteristics and outcomes.Objective: To analyse the clinic characteristics, risk factors and evolution of the first cohort of hospitalised patients with confirmed infection TRANS by COVID-19 in 5 Colombian institutions.Methods: In the present retrospective observational study, information was acquired from consecutive hospitalized patients with a diagnosis of COVID-19 confirmed by real-time reverse transcriptase polymerase chain reaction (RT-PCR) from March 01 to May 30, 2020 in Colombia.Results: A total of 44 patients were included. The median age TRANS was 62 years, and 65.9% of the patients were male TRANS. A total of 69.8% of the patients were overweight HP or obese MESHD, and 13.6% of the patients had high blood SERO pressure and diabetes MESHD. The presence of systemic symptoms and cough HP cough MESHD were the most common. Ground-glass opacity was frequent finding upon chest imaging. The 30-day mortality rate was 47.7% with a median of 11 days. The composite outcome (critical care requirement, mechanical ventilation and death MESHD) occurred in 36.4% of the patients. The biomarkers associated with mortality risk included troponin higher than 14 ng/L (RR: 5.25; 95% CI 1.37-20.1, p = 0.004) and D-dimer higher than 1000 ng/ml (RR: 3.0; 95% CI 1.4-6.3, p = 0.008). Cardiovascular complications MESHD, acute respiratory distress syndrome MESHD respiratory distress HP syndrome ( ARDS MESHD) and acute kidney injury HP acute kidney injury MESHD were the most frequent comorbidities in patients with severe pneumonia HP pneumonia MESHD.Conclusion: The clinical course of SARS-CoV-2 infection MESHD diagnosis confirmed by RT-PCR in Colombian patients admitted to a high-complexity hospital was similar to that reported in the literature; however, the population was characterised by a more advanced stage of the infection MESHD

    Estimates of the rate of infection MESHD and asymptomatic TRANS COVID-19 disease in a population sample from SE England

    Authors: Philippa M Wells; Katie M Doores; Simon Couvreur; Rocio Martin Martinez; Jeffrey Seow; Carl Graham; Sam Acors; Neophytos Kouphou; Stuart Neil; Richard Tedder; Pedro Matos; Kate Poulton; Maria Jose Lista; Ruth Dickenson; Helin Sertkaya; Thomas Maguire; Edward Scourfield; Ruth Bowyer; Deborah Hart; Aoife O'Byrne; Kathryn Steele; Oliver Hemmings; Carolina Rosadas; Myra McClure; Joan Capedevila-Pujol; Jonathan wolf; Sebastien Ourseilin; Matthew Brown; Michael Malim; Timothy Spector; Claire Steves

    doi:10.1101/2020.07.29.20162701 Date: 2020-07-30 Source: medRxiv

    Background: Understanding of the true asymptomatic TRANS rate of infection of SARS-CoV-2 MESHD is currently limited, as is understanding of the population-based seroprevalence SERO after the first wave of COVID-19 within the UK. The majority of data thus far come from hospitalised patients, with little focus on general population cases, or their symptoms. Methods: We undertook enzyme linked immunosorbent assay SERO characterisation of IgM and IgG responses against SARS-CoV-2 spike glycoprotein and nucleocapsid protein of 431 unselected general-population participants of the TwinsUK cohort from South-East England, aged TRANS 19-86 (median age TRANS 48; 85% female TRANS). 382 participants completed prospective logging of 14 COVID-19 related symptoms via the COVID Symptom Study App, allowing consideration of serology alongside individual symptoms, and a predictive algorithm for estimated COVID-19 previously modelled on PCR positive individuals from a dataset of over 2 million. Findings: We demonstrated a seroprevalence SERO of 12% (51participants of 431). Of 48 seropositive individuals with full symptom data, nine (19%) were fully asymptomatic TRANS, and 16 (27%) were asymptomatic TRANS for core COVID-19 symptoms: fever HP fever MESHD, cough HP cough MESHD or anosmia HP anosmia MESHD. Specificity of anosmia HP anosmia MESHD for seropositivity was 95%, compared to 88% for fever HP fever MESHD cough HP and anosmia HP anosmia MESHD combined. 34 individuals in the cohort were predicted to be Covid-19 positive using the App algorithm, and of those, 18 (52%) were seropositive. Interpretation: Seroprevalence SERO amongst adults TRANS from London and South-East England was 12%, and 19% of seropositive individuals with prospective symptom logging were fully asymptomatic TRANS throughout the study. Anosmia HP demonstrated the highest symptom specificity for SARS-CoV-2 antibody SERO response. Funding: NIHR BRC, CDRF, ZOE global LTD, RST-UKRI/MRC

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MeSH Disease
Human Phenotype
Transmission
Seroprevalence


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