Claim: Two Pfizer doses are 99.96% effective.
Fact-check: Pfizer vaccine effective, though not as effective as newspapers suggest - Full Fact
Verdict: the pfizer vaccine has an efficacy rate of over 90%. the 99.96% figure is not an efficacy rate but the proportion of people vaccinated in israel who did not later test positive for the virus.
Organisation: Full Fact
Author: Abbas Panjwani
Date published: 2021-02-02T00:00:00