Lorenzo Polidori

TL;DR: In this article, the authors examined the proportion and probability of self-reported systemic and local side-effects within 8 days of vaccination in individuals using the COVID Symptom Study app who received one or two doses of the BNT162b2 vaccine or one dose of the ChAdOx1 nCoV-19 vaccine.

TL;DR: In this article, the authors identify risk factors for post-vaccination SARS-CoV-2 infection and describe the characteristics of post-vaccination illness, using self-reported data from UK-based, adult users of the COVID Symptom Study mobile phone app, including demographics, geographical location, health risk factors, and COVID-19 test results, symptoms, and vaccinations.

TL;DR: The prevalence of symptoms that characterise an omicron infection differs from those of the delta SARS-CoV-2 variant, apparently with less involvement of the lower respiratory tract and reduced probability of hospital admission.

TL;DR: In this paper, an ecological study was conducted to examine the association between the regional proportion of infections with the SARS-CoV-2 B.1.7 and reported symptoms, disease course, rates of reinfection, and transmissibility.

TL;DR: Investigation of COVID-19 primary vaccine series effectiveness and its waning, and the safety and effectiveness of booster doses, in a UK community setting found booster doses restore vaccine effectiveness.