WHO to monitor new COVID-19 variant B.1.621 or 'Mu' for vaccine resistance
The COVID-19 strain B.1.621 or ‘Mu’ was first detected in Colombia in January 2021.
Sep 01, 2021, 16:58 PM IST
The COVID-19 strain B.1.621 or ‘Mu’ was first detected in Colombia in January 2021.
Sep 01, 2021, 16:58 PM IST