Why the Vaccinated Are Still at Risk From Coronavirus

1 min read
0
16
Why the Vaccinated Are Still at Risk From Coronavirus

In clinical trials for the Covid vaccines now in use, efficacy rates ranged from 50% to 95%. Those rates mean that in the group of trial volunteers who received the vaccine, cases of Covid were anywhere from 50% to 95% lower than in the group of volunteers who received a placebo. On an individual basis, an efficacy rate of, say, 80%, means an immunized person’s risk of becoming ill is roughly 20% of that for an otherwise similar non-immunized person. However, a vaccine’s performance in the real world, known as its effectiveness, isn’t necessarily the same as its efficacy in a study under controlled conditions. And both efficacy and effectiveness can vary for the same vaccine across populations, time points and the regimens used; the rates are influenced by multiple factors, including the SARS-CoV-2 variants present and adherence to social and public health measures that prevent transmission of the virus.



Source link

Load More Related Articles
Load More In Business
Comments are closed.

Check Also

Eviction moratorium expires July 31 as renters face rising risk of covid cases and lack of aid

In the weeks leading up to July 31, the administration held two eviction-prevention meetin…