India – India tests 2-dose COVID-19 vaccine despite reduced efficacy

Serum Institute of India, which has partnered with AstraZeneca to manufacture its COVID-19 vaccine, will continue to test a two full dose regimen of the shot despite it showing a lower success rate than a half and full dose regimen in pivotal trials, a top executive told Reuters.

The British drugmaker has said its COVID-19 vaccine could be up to 90% effective if administered as a half dose followed by a full dose, but some scientists have questioned the robustness of that result because only a few thousand people were given that regimen in late-stage UK trials…