The highly contagious BA.4 and BA.5 Omicron subvariants make up a combined 13% of recent Covid-19 cases, the CDC estimates, potentially lengthening the current surge https://t.co/MjbrCENZ1l— WSJ Health (@WSJhealth) June 7, 2022
The highly contagious BA.4 and BA.5 Omicron subvariants make up a combined 13% of recent Covid-19 cases, the CDC estimates, potentially lengthening the current surge https://t.co/MjbrCENZ1l