Vaccines Remain Effective against BA.2, but Protection from Infection Wanes over Time

The Omicron subvariant BA.2 is replacing its sister version, BA.1, as the dominant form of SARS-CoV-2 in many countries, which has led scientists to wonder whether the COVID-19 pandemic is about to throw these regions into disarray yet again. But a study published on 13 March shows that mRNA vaccines offer a similar degree […]