BioNTech and Pfizer to begin clinical trial of vaccine for new Covid variants | Financial Times

Aun nos costara tener booster que cubra las variante omicron, tardaran…"shots targeted at BA.4 and BA.5 as early as October"

https://www.ft.com/content/b6825ee8-3631-4f1c-a4e0-119802c7bb7d