Two doses of COVID-19 vaccine crucial to maximize effectiveness against delta variant
03 Sep 2021
byRoshini Claire Anthony
Although both the BNT162b2 and ChAdOx1 nCoV-19 vaccines appear to be effective against symptomatic disease caused by the delta variant of the SARS-CoV-2 virus, the effectiveness is lower than that against the alpha variant. However, this reduced effectiveness was less pronounced after two doses of the vaccine, a recent study from England showed.