Study on SARS-CoV-2 Delta breakthrough infections shows twice the risk as Alpha

By | August 25, 2021
A recent study conducted by Portuguese scientists has claimed that mRNA-based coronavirus disease 2019 (COVID-19) vaccines are less effective against the delta variant of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). Moreover, in breakthrough infections by delta variant, vaccines are less effective in reducing viral loads. The study is currently available on the medRxiv* preprint server.