claim: self-reported symptoms of covid-19 including symptoms most predictive of sars-cov-2 infection , are heritable
evidence_1: we are grateful to all the users of c-19 covid symptom tracker app for their contribution to this study.", "twinsuk volunteers (n=2633) completing the c-19 covid symptom tracker app allowed classical twin studies of covid-19 symptoms including predicted covid-19, a symptom-based algorithm predicting true infection derived in app users tested for sars-cov-2.")