Immune responses against Delta variant in people vaccinated in the UK
Simon Collins, HIV i-Base
A large community based survey of randomly selected households in the UK reported reduced generally high efficacy of the three main vaccines against the Delta variant.
However, reduced and waning protection against Delta variant over time supports third vaccine for people with reduced immune responses after two doses.
Ref: Pouwels KB et al. Impact of Delta on viral burden and vaccine effectiveness against new SARS-CoV-2 infections in the UK.