Omicron subvariant BA.2: Health officials call it 'variant of concern'
The subvariant omicron BA.2 has health officials’ attention, just as COVID restrictions have eased up. It has been classified as a “variant of concern,” according to the Centers for Disease Control and Prevention (CDC) and the World Health Organization (WHO). This variant is also called “stealth” omicron because its genetic mutations could make it difficult to…