… vaccine effectiveness against symptomatic Covid-19 caused by the omicron variant as
compared with the delta variant in persons 18 years of age or older. The odds of vaccination in …

… , and vaccine registry databases. We assessed vaccine effectiveness against Covid-19
from May 1 through September 3, 2021, and against hospitalization with Covid-19 from May …

… coronavirus disease 2019 (Covid-19) vaccine effectiveness … had accessed medical care for
Covid-19–like illness and had … Vaccine effectiveness was estimated by comparing the odds …

… Safe and effective COVID-19 vaccines were developed in 11 months. In the next year, effective
vaccination and prevention efforts could prove decisive, and, although the work ahead is …

… on how to assess COVID-19 vaccine effectiveness (VE) using observational study designs.
It discusses critical considerations in the design, analysis and interpretation of COVID-19 VE …

… dominant strain, due in part to reduced vaccine effectiveness. 1 An increase in sequenced
cases … 3 The UK COVID-19 vaccination programme has been in place since Dec 8, 2020, with …

… A 69-year old receives a COVID-19 vaccine in a Phase 3 trial. It is important to understand
how different groups respond to COVID-19 vaccines to establish the most effective …

… as a measure of the vaccine's effectiveness. The authors end up comparing the numbers
needed to vaccinate to prevent one case of COVID-19 among the vaccines, which derives from …

… of COVID-19 vaccination be confirmed by reviewing documentation (eg, vaccination card, …
be collected about the vaccine product (for each dose) and the timing of vaccination, as well …

… -2 infection to ultimately control the COVID-19 pandemic (1). The World … COVID-19 vaccines
as under development (2), and expectations for effective prophylactic COVID-19 vaccines …