Omicron sub-variant BA.2 makes up 72% of COVID-19 variants in US: CDC April 4, 2022 Source: Omicron sub-variant BA.2 makes up 72% of COVID-19 variants in US: CDC Category: World Updated: April 4, 2022 at 9:21 pm ◀ Woman in Hummer strikes cruisers, officers injured Ketanji Brown Jackson confirmation vote is ‘making history’, says senator – as it happened – The Guardian ▶