Claim: Covid-19 vaccines' effectiveness dropped from 98% to just 1% among a wider, younger population. This information appeared in the Lancet medical journal.
Fact-check: The Lancet didn't say Covid-19 vaccines are only 1% effective - Full Fact
Verdict: the pfizer and moderna vaccines both reported over 90% effectiveness in trials. a subsequent lancet article argued these relative risk reduction figures should be published alongside absolute risk reduction figures, a totally different measurement which the article said were around 1 to 2 percentage points for the vaccines. the latest data relating to the omicron variant does show vaccine effectiveness reduces significantly over time however.
Organisation: Full Fact
Author: Grace Rahman
Date published: 2022-05-10T00:00:00