Explainer: What do we know about COVID variant XBB.1.5?
Karachi detects six cases of new Covid-19 variant
Over 40% of US COVID cases caused by Omicron subvariant XBB.1.5
UK approves Pfizer’s COVID booster targeting Omicron BA.4/5
Novavax says Omicron shot shows strong immune response as second booster
Pfizer/BioNTech Omicron vaccine shows strong response
Pfizer, BioNTech say updated COVID booster protects against Omicron
Germany to start Omicron-adapted COVID vaccinations next week – minister
Omicron-adapted COVID vaccine wins first approval in Britain
Omicron better at invading young noses than other COVID variants