Corpus overview


Overview

MeSH Disease

Fever (414)

Cough (414)

Disease (213)

Infections (206)

Coronavirus Infections (149)


Human Phenotype

Fever (414)

Cough (414)

Fatigue (138)

Pneumonia (117)

Dyspnea (75)


Transmission

Seroprevalence
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    Estimates of the rate of infection and asymptomatic MESHD asymptomatic TRANS COVID-19 disease MESHD 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 MESHD of SARS-CoV-2 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 MESHD fever HP, cough MESHD cough HP or anosmia HP. Specificity of anosmia HP for seropositivity was 95%, compared to 88% for fever MESHD fever HP cough MESHD cough HP and anosmia HP 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

    Determinants of SARS-CoV-2 infection MESHD in Italian healthcare workers: a multicenter study

    Authors: Paolo Boffetta; Francesco Violante; Paolo Durando; Giuseppe De Palma; Enrico Pira; Luigi Vimercati; Alfonso Cristaudo; Giancarlo Icardi; Emma Sala; Maurizio Coggiola; Silvio Tafuri; Vittorio Gattini; Pietro Apostoli; Giovanna Spatari; - Working Group on SARS-CoV-2 infection in Italian healthcare workers

    doi:10.1101/2020.07.29.20158717 Date: 2020-07-30 Source: medRxiv

    Background. Healthcare workers (HCW) are at increased risk of being infected with SARS-CoV-2, yet limited information is available on risk factors of infection MESHD. Methods. We pooled data on occupational surveillance of 10,654 HCW who were tested for SARS-CoV-2 infection MESHD in six Italian centers. Information was available on demographics, job title, department of employment, source of exposure, use of personal protective equipment (PPE), and COVID-19-related symptoms. We fitted multivariable logistic regression models to calculate odds ratios (OR) and 95% confidence intervals (CI). Findings. The prevalence SERO of infection MESHD varied across centers and ranged from 3.0% to 22.0%, being strongly correlated with that of the respective areas. Women were at lower risk of infection TRANS risk of infection TRANS infection MESHD compared to men. Fever MESHD Fever HP, cough MESHD cough HP, dyspnea MESHD dyspnea HP and malaise were the symptoms most strongly associated with infection MESHD, together with anosmia HP and ageusia MESHD. No differences in the risk of infection TRANS risk of infection TRANS infection MESHD were detected between job titles, or working in a COVID-19 designated department. Reported contact with a patient inside or outside the workplace was a risk factor. Use of a mask was strongly protective against risk of infection TRANS risk of infection TRANS infection MESHD as was use of gloves. The use of a mask by the source of exposure (patient or colleague) had an independent effect in reducing infection MESHD infection risk TRANS infection risk TRANS risk.

    Examining Australian's beliefs, misconceptions, and sources of information for COVID-19: A national online survey

    Authors: Rae Thomas; Hannah Greenwood; Zoe A Michaleff; Eman Abukmail; Tammy Hoffmann; Kirsten J McCaffery; Leah Hardiman; Paul Glasziou

    doi:10.1101/2020.07.27.20163204 Date: 2020-07-29 Source: medRxiv

    Objective: Public cooperation to practice preventive health behaviours is essential to manage the transmission TRANS of infectious diseases MESHD such as COVID-19. We aimed to investigate beliefs about COVID-19 diagnosis, transmission TRANS and prevention that have the potential to impact the uptake of recommended public health strategies. Design: An online cross-sectional survey conducted May 8 to May 11 2020. Participants: A national sample of 1500 Australian adults TRANS with representative quotas for age TRANS and gender TRANS provided by online panel provider. Main outcome measure: Proportion of participants with correct/incorrect knowledge of COVID-19 preventive behaviours and reasons for misconceptions. Results: Of the 1802 potential participants contacted, 289 were excluded, 13 declined, and 1500 participated in the survey (response rate 83%). Most participants correctly identified washing your hands regularly with soap and water (92%) and staying at least 1.5m away from others (90%) could help prevent COVID-19. Over 40% (incorrectly) considered wearing gloves outside of the home would prevent them contracting COVID-19. Views about face masks were divided. Only 66% of participants correctly identified that regular use of antibiotics would not prevent COVID-19. Most participants (90%) identified fever MESHD fever HP, fatigue MESHD fatigue HP and cough MESHD cough HP as indicators of COVID-19. However, 42% of participants thought that being unable to hold your breath for 10 seconds without coughing MESHD coughing HP was an indicator of having the virus. The most frequently reported sources of COVID-19 information were commercial television channels (56%), the Australian Broadcasting Corporation (43%), and the Australian Government COVID-19 information app (31%). Conclusions: Public messaging about hand hygiene and physical distancing to prevent transmission TRANS appear to have been effective. However, there are clear, identified barriers for many individuals that have the potential to impede uptake or maintenance of these behaviours in the long-term. Currently these non-drug interventions are our only effective strategy to combat this pandemic. Ensuring ongoing adherence to is critical.

    Children TRANS with COVID-19 like symptoms in Italian Pediatric Surgeries: the dark side of the coin

    Authors: Gianfranco Trapani; Vassilios Fanos; Enrico Bertino; Giulia Maiocco; Osama Al Jamal; Michele Fiore; VIncenzo Bembo; Domenico Careddu; Lando Barberio; Luisella Zanino; Giuseppe Verlato

    doi:10.1101/2020.07.27.20149757 Date: 2020-07-29 Source: medRxiv

    BACKGROUND: Symptoms of SARS-CoV-2 infection MESHD in children TRANS are nonspecific and shared with other common acute viral illnesses ( fever MESHD fever HP, respiratory or gastrointestinal symptoms, and cutaneous signs), thus making clinical differential diagnosis tricky. In Italy, first line management of pediatric care is handed over to Primary Care Pediatricians (PCPs), who were not allowed to directly perform diagnostic tests during the recent COVID-19 outbreak. Without a confirmatory diagnosis, PCPs could only collect information on ''COVID-19 like symptoms'' rather than identify typical COVID-19 symptoms. AIM: To evaluate the prevalence SERO of COVID-19 like symptoms in outpatient children TRANS, during Italian lockdown. To provide PCPs a risk score to be used in clinical practice during the differential diagnosis process. METHODS: A survey was submitted to 50 PCPs (assisting 47,500 children TRANS) from 7 different Italian regions between the 4th of March and the 23rd of May 2020 (total and partial lockdown period). COVID-19 like symptoms in the assisted children TRANS were recorded, as well as presence of confirmed/suspected cases in children TRANS's families, which was taken as proxy of COVID-19. Multivariable logistic regression was accomplished to estimate the risk of having suspected/ confirmed cases TRANS in families, considering symptoms as potential determinants. RESULTS: 2,300 children TRANS (4.8% of overall survey population) fell HP ill with COVID-19 like symptoms, 3.1% and 1.7% during total and partial lockdown period respectively. The concurrent presence of fatigue MESHD fatigue HP, cough MESHD cough HP, and diarrhea MESHD diarrhea HP in children TRANS, in absence of sore throat/ earache MESHD and abnormal skin signs, represents the maximum risk level of having a suspected/ confirmed case TRANS of COVID-19 at home. CONCLUSIONS: The percentage of children TRANS presenting COVID-19 like symptoms at home has been remarkable also during the total lockdown period. The present study identified a pattern of symptoms which could help, in a cost-effective perspective, PCPs in daily clinical practice to define priorities in addressing children TRANS to the proper diagnostic procedure.

    Clinical characteristics of neonates with coronavirus disease MESHD 2019 (COVID-19): a systematic review

    Authors: Yuan Hu; Jing Xiong; Yuan Shi

    doi:10.21203/rs.3.rs-50795/v1 Date: 2020-07-29 Source: ResearchSquare

    This study aimed to summarize the existing literature on severe acute respiratory syndrome MESHD coronavirus 2 (SARS-CoV-2) infection in newborns to clarify the clinical features and outcomes of neonates with COVID-19. A systematic search was performed in PubMed, Embase, Cochrane Library, China National Knowledge Infrastructure (CNKI), Wanfang Data, and VIP databases from January 1, 2019 to April 30, 2020. The references of relevant studies were also searched. A descriptive summary was organized by aspects of clinical presentations (symptoms, laboratory examinations, and imaging) and outcomes. We identified 14 studies reporting 18 newborns with COVID-19. The most common clinical manifestations were fever MESHD fever HP (62.5%), shortness of breath (50.0%), diarrhea MESHD diarrhea HP/ vomiting MESHD vomiting HP/feeding intolerance(43.8%), cough MESHD cough HP (37.5%), dyspnea MESHD dyspnea HP (25.0%), and nasal congestion/runny nose/ sneeze MESHD sneeze HP(25.0%). Atypical symptoms included jaundice MESHD jaundice HP and convulsion. Lymphocyte numbers decreased in 5 cases, and radiographic findings were likely to show pneumonia MESHD pneumonia HP. All newborns recovered and discharged from the hospital, and there was no death MESHD.Conclusion: Clinical symptoms of neonatal SARS-CoV-2 infection MESHD are atypical, most of them are mild. Up to now, the prognosis of newborns is good, and there is no death MESHD. Intrauterine vertical transmission TRANS is possible, but confirmed evidence is still lacking. The Long-term follow-up of potential influences of SARS-CoV-2 infection MESHD on neonates need further exploration.

    Association of olfactory dysfunction with hospitalization for COVID-19: a multicenter study in Kurdistan

    Authors: Hosna Zobairy; Erfan Shamsoddin; Mohammad Aziz Rasouli; Nasrollah Veisi Khodlan; Ghobad Moradi; Bushra Zareie; Sara Teymori; Jalal Asadi; Ahmad Sofi-Mahmudi; Ahmad R. Sedaghat

    doi:10.1101/2020.07.26.20158550 Date: 2020-07-28 Source: medRxiv

    Objective: To evaluate the association of olfactory dysfunction (OD) with hospitalization for COVID-19. Study Design: Multi-center cohort study. Setting: Emergency MESHD departments of thirteen COVID-19-designed hospitals in Kurdistan province, Iran. Subjects and Methods: Patients presenting with flu-like symptoms who tested positive by RT-PCR for COVID-19 between May 1st and 31st, 2020. At the time of presentation and enrollment, patients were asked about the presence of OD, fever MESHD fever HP, cough MESHD cough HP, shortness of breath, headache MESHD headache HP, rhinorrhea HP and sore throat. The severity of OD was assessed on an 11-point scale from 0 (none) to 10 ( anosmia HP). Patients were either hospitalized or sent home for outpatient care based on standardized criteria. Results: Of 203 patients, who presented at a mean of 6 days into the COVID-19 disease MESHD course, 25 patients (12.3%) had new OD and 138 patients (68.0%) were admitted for their COVID-19. Patients admitted for COVID-19 had a higher prevalence SERO of all symptoms assessed, including OD (p<0.05 in all cases), and OD identified admitted patients with 84.0% sensitivity SERO and 34.3% specificity. On univariate logistic regression, hospitalization was associated with OD (odds ratio [OR] = 2.47, 95%CI: 1.085-6.911, p=0.049). However, hospitalization for COVID-19 was not associated with OD (OR=3.22, 95% CI: 0.57-18.31, p=0.188) after controlling for confounding demographics and comorbidities. Conclusion: OD may be associated with hospitalization for (and therefore more severe) COVID-19. However, this association between OD and COVID-19 severity is more likely driven by patient characteristics linked to OD, such as greater numbers of COVID-19 symptoms experienced or high-risk comorbidities.

    The Outcome of COVID-19 Patients with Acute Myocardial Infarction MESHD Myocardial Infarction HP

    Authors: Hassan Altamimi; Yasser Alahmad; Fadi Khazal; Mowahib Elhassan; Hajar AlBinali; Abdulrahman Arabi; Awad AlQahtani; Nidal Asaad; Mohammed Al-Hijji; Tahir Hamid; Ihsan Rafie; Ali S. Omrani; Saad AlKaabi; Abdullatif Alkhal; Muna AlMalslmani; Mohammed Ali; Murad Alkhani; Mariam AlNesf; Salem Abu Jalala; Salaheddine Arafa; Reem ElSousy; Omar AlTamimi; Ezzeldine Soaly; Charbel Abi khalil; Jassim Al Suwaidi

    doi:10.1101/2020.07.21.20156349 Date: 2020-07-27 Source: medRxiv

    Background Coronavirus Disease MESHD 2019 (COVID-19) is a rapidly expanding global pandemic resulting in significant morbidity and mortality. COVID-19 patients may present with acute myocardial infarction MESHD myocardial infarction HP (AMI). The aim of this study is to conduct detailed analysis on patients with AMI and COVID-19. Methods We included all patients admitted with AMI and actively known or found to be COVID-19 positive by PCR between the 4th February 2020 and the 11th June 2020 in the State of Qatar. Patients were divided into ST-elevation myocardial infarction MESHD myocardial infarction HP (STEMI) and Non-STE (NSTEMI). Results There were 68 patients (67 men and 1 woman) admitted between the 4th of February 2020 and the 11th of June 2020 with AMI and COVID-19. The mean age TRANS was 49.1, 46 patients had STEMI and 22 had NSTEMI. 38% had diabetes mellitus MESHD diabetes mellitus HP, 31% had hypertension MESHD hypertension HP, 16% were smokers, 13% had dyslipidemia, and 14.7% had prior cardiovascular disease MESHD. Chest pain MESHD Chest pain HP and dyspnea MESHD dyspnea HP were the presenting symptoms in 90% and 12% of patients respectively. Fever MESHD Fever HP (15%) and cough MESHD cough HP (15%) were the most common COVID-19 symptoms, while the majority had no viral symptoms. Thirty-nine (33 STEMI and 6 NSTEMI) patients underwent coronary angiography, 38 of them had significant coronary disease MESHD. Overall in-hospital MACE was low; 1 patient developed stroke MESHD stroke HP and 2 died. Conclusion Contrary to previous small reports, overall in-hospital adverse events were low in this largest cohort of COVID-19 patients presenting with AMI. We hypothesize patient profile including younger age TRANS contributed to these findings. Further studies are required to confirm this observation.

    Coronavirus Disease MESHD (COVID-19): Reviews, Applications, and Current Status

    Authors: Tanweer Alam

    id:10.20944/preprints202007.0641.v1 Date: 2020-07-26 Source: Preprints.org

    Currently, the COVID‐19 has directly affected the millions of humans lives. The symptoms of the disease MESHD involving fever MESHD fever HP, malaise, chest infection MESHD, and breathing difficulties, were identified, and its existence is continuously becoming restructured. The World Health Organization (WHO) had mentioned the wide diagnostics test besides COVID-19 that would also assist medical facilities to recognize infectious diseases as well MESHD as currently focusing efficiently on preventing and afterward defeating this viral disease MESHD. The infection MESHD is usually transmitted among human beings in direct contact, greatest through the liquid bubbles generated through cough MESHD cough HP, sneeze MESHD sneeze HP, or speaking. This paper reviews the COVID 19 pandemic, its history, current updates, contact tracing TRANS applications, and use of emerging technologies like the Internet of Things (IoT) and Blockchain for stopping the spreading and provide service online to the patient from a distance.

    Recent smell loss is the best predictor of COVID-19: a preregistered, cross-sectional study

    Authors: Richard C. Gerkin; Kathrin Ohla; Maria Geraldine Veldhuizen; Paule V. Joseph; Christine E. Kelly; Alyssa J. Bakke; Kimberley E. Steele; Michael C. Farruggia; Robert Pellegrino; Marta Y. Pepino; Cédric Bouysset; Graciela M. Soler; Veronica Pereda-Loth; Michele Dibattista; Keiland W. Cooper; Ilja Croijmans; Antonella Di Pizio; M. Hakan Ozdener; Alexander W. Fjaeldstad; Cailu Lin; Mari A. Sandell; Preet B. Singh; V. Evelyn Brindha; Shannon B. Olsson; Luis R. Saraiva; Gaurav Ahuja; Mohammed K. Alwashahi; Surabhi Bhutani; Anna D'Errico; Marco A. Fornazieri; Jérôme Golebiowski; Liang-Dar Hwang; Lina Öztürk; Eugeni Roura; Sara Spinelli; Katherine L. Whitcroft; Farhoud Faraji; Florian Ph.S Fischmeister; Thomas Heinbockel; Julien W. Hsieh; Caroline Huart; Iordanis Konstantinidis; Anna Menini; Gabriella Morini; Jonas K. Olofsson; Carl M. Philpott; Denis Pierron; Vonnie D. C. Shields; Vera V. Voznessenskaya; Javier Albayay; Aytug Altundag; Moustafa Bensafi; María Adelaida Bock; Orietta Calcinoni; William Fredborg; Christophe Laudamiel; Juyun Lim; Johan N. Lundström; Alberto Macchi; Pablo Meyer; Shima T. Moein; Enrique Santamaría; Debarka Sengupta; Paloma Paloma Domínguez; Hüseyin Yanık; Sanne Boesveldt; Jasper H. B. de Groot; Caterina Dinnella; Jessica Freiherr; Tatiana Laktionova; Sajidxa Mariño; Erminio Monteleone; Alexia Nunez-Parra; Olagunju Abdulrahman; Marina Ritchie; Thierry Thomas-Danguin; Julie Walsh-Messinger; Rashid Al Abri; Rafieh Alizadeh; Emmanuelle Bignon; Elena Cantone; Maria Paola Cecchini; Jingguo Chen; Maria Dolors Guàrdia; Kara C. Hoover; Noam Karni; Marta Navarro; Alissa A. Nolden; Patricia Portillo Mazal; Nicholas R. Rowan; Atiye Sarabi-Jamab; Nicholas S. Archer; Ben Chen; Elizabeth A. Di Valerio; Emma L. Feeney; Johannes Frasnelli; Mackenzie Hannum; Claire Hopkins; Hadar Klein; Coralie Mignot; Carla Mucignat; Yuping Ning; Elif E. Ozturk; Mei Peng; Ozlem Saatci; Elizabeth A. Sell; Carol H. Yan; Raul Alfaro; Cinzia Cecchetto; Gérard Coureaud; Riley D. Herriman; Jeb M. Justice; Pavan Kumar Kaushik; Sachiko Koyama; Jonathan B. Overdevest; Nicola Pirastu; Vicente A. Ramirez; S. Craig Roberts; Barry C. Smith; Hongyuan Cao; Hong Wang; Patrick Balungwe; Marius Baguma; Thomas Hummel; John E. Hayes; Danielle R. Reed; Masha Y. Niv; Steven D. Munger; Valentina Parma

    doi:10.1101/2020.07.22.20157263 Date: 2020-07-26 Source: medRxiv

    Background: COVID-19 has heterogeneous manifestations, though one of the most common symptoms is a sudden loss of smell ( anosmia HP or hyposmia HP). We investigated whether olfactory loss is a reliable predictor of COVID-19. Methods: This preregistered, cross-sectional study used a crowdsourced questionnaire in 23 languages to assess symptoms in individuals self-reporting recent respiratory illness. We quantified changes in chemosensory abilities during the course of the respiratory illness using 0-100 visual analog scales (VAS) for participants reporting a positive (C19+; n=4148) or negative (C19-; n=546) COVID-19 laboratory test outcome. Logistic regression models identified singular and cumulative predictors of COVID-19 status and post-COVID-19 olfactory recovery. Results: Both C19+ and C19- groups exhibited smell loss, but it was significantly larger in C19+ participants (mean{+/-}SD, C19+: -82.5{+/-}27.2 points; C19-: -59.8{+/-}37.7). Smell loss during illness was the best predictor of COVID-19 in both single and cumulative feature models (ROC AUC=0.72), with additional features providing no significant model improvement. VAS ratings of smell loss were more predictive than binary chemosensory yes/no-questions or other cardinal symptoms, such as fever MESHD fever HP or cough MESHD cough HP. Olfactory recovery within 40 days was reported for ~50% of participants and was best predicted by time since illness onset. Conclusions: As smell loss is the best predictor of COVID-19, we developed the ODoR-19 tool, a 0-10 scale to screen for recent olfactory loss. Numeric ratings [≤]2 indicate high odds of symptomatic COVID-19 (10

    EPICOVID19: Psychometric assessment and validation of a short diagnostic scale for a rapid Covid-19 screening based on reported symptoms

    Authors: Luca Bastiani; Loredana Fortunato; Stefania Pieroni; Fabrizio Bianchi; Fulvio Adorni; Federica Prinelli; Andrea Giacomelli; Gabriele Pagani; Stefania Maggi; Caterina Trevisan; Marianna Noale; Nithiya Jesuthasan; Aleksandra Sojic; Carla Pettenati; Massimo Andreoni; Raffaele Antonelli Incalzi; Massimo Galli; Sabrina Molinaro

    doi:10.1101/2020.07.22.20159590 Date: 2020-07-25 Source: medRxiv

    Background Confirmed COVID-19 cases have been reported in 213 countries and regions and as of 12 July 2020, over 12 million cases, with 561617 deaths MESHD have been reported worldwide. The number of cases changes quickly and varies depending upon which source you use to track, so in the current epidemiological context, the early recognition is critical for the rapid identification of suspected cases (with SARS-CoV-2 infection MESHD-like symptoms and signs MESHD) to be immediately subjected to quarantine measures. Although surveys are widely used for identifying COVID-19 cases, outcomes and associated risks, no validated epidemiological tool exists for surveying SARS-CoV-2 infection MESHD in the population so far. Methods Our study is the phase II of the EPICOVID19 national survey, launched in April 2020 including a national convenience sample of 201121 adults TRANS, who voluntarily filled the EPICOVID19 questionnaire. The phase II questionnaire was mailed to all subjects who underwent tests for COVID-19 by nasopharyngeal swab (NPS) and who accepted to be involved in the second phase of the study, focused on the results reported for NPS and/or serological IgG/IgM tests. We evaluated the capability of the self-reported symptoms collected through the EPICOVID19 questionnaire to discriminate the COVID-19 among symptomatic subjects, in order to identify possible cases to undergo instrumental measurements and clinical examinations. We defined a method for the identification of a total score and validated it with reference to the serological and molecular clinical diagnosis, using four standard steps: identification of critical factors, confirmation of presence of latent variable, development of optimal scoring algorithm and validation of the scoring algorithm. Findings 2703 subjects [66% response rate] completed the Phase II questionnaire. Of 2703 individuals, 694 (25.7%) were NPS(+) and of these 84 (12.1% of the 694 NPS(+)) were asymptomatic TRANS. In the individuals who performed serological testing SERO, of the 472 who did IgG(+) and 421 who did IgM(+), 22.9% and 11.6% tested positive, respectively. Among IgG(+) 1 of 108 subjects was asymptomatic TRANS (0.9%) while 5/49 subjects among IgM(+) were asymptomatic TRANS (10.2%). Compared with NPS(-), among NPS(+) subjects there was a higher rate for Fever MESHD Fever HP (421 [60.7%] vs 391[19.5% ]; p<0.0001), Loss of Taste and/or Smell (365 [52.6%] vs 239 [11.9% ]; p<0.0001) and Cough MESHD Cough HP (352 [50.7%] vs 580 [28.9% ]; p<0.0001). Also for other symptoms the frequencies were significantly higher in NPS(+) subjects than in NPS(-) ones (p<0.001). Among groups with serological tests SERO, the symptoms with higher percentages in the subjects IgG(+) were Fever MESHD Fever HP (65 [60.2%] vs 43[11.8% ]; p<0.0001) and Pain MESHD Pain HP in muscles, bones, joints (73 [67.6%] vs 71 [19.5% ]; p<0.0001). For the COVID-19 self-reported symptoms items, exploratory (proportion variance explained [89.9%]) and confirmatory factor analysis results (SMSR 0.072; RMSEA 0.052) highlights the presence of one latent variable (factor) underlying the symptoms. We define the one-factor solution as EPICOVID19 diagnostic scale and optimal score for each items was identified: Respiratory problems (1.03), Chest pain MESHD Chest pain HP (1.07), Loss of Taste and/or Smell (0.97) and Tachycardia MESHD Tachycardia HP ( palpitations HP) (1.05) were the most important symptoms. The cut-off score was 2.56 ( Sensitivity SERO 76.56%; Specificity 68.24%) in NPS(+) and 2.59 (Se 80.37; Sp 80.17) in IgG(+) subjects.

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Transmission
Seroprevalence


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