RT @WHO: Here’s what you need to know about Omicron sublineages BA.4, BA.5, BA.2.75 – an update from Dr @mvankerkhove

RT @WHO: Here’s what you need to know about Omicron sublineages BA.4, BA.5, BA.2.75 – an update from Dr @mvankerkhove ⬇️

Countries and ind…