Tweet from medriva at May 13, 2022 at 12:46PM
BREAKING: The ECDC (European Centre for Disease Prevention and Control) has upgraded Omicron Sub Lineages BA.4 and BA. 5 to Variants of Concern from Variants of Interest, making it the first public health authority to do so.
— BNO|Medriva Newsroom (@medriva)
May 13, 2022
from http://twitter.com/medriva