New studies bring BA.2 variant into sharper focus | CNN

On the heels of concerning new lab and animal experiments suggesting that BA.2 may be capable of causing more severe disease than the original Omicron strain, two new studies are helping to show how well human immunity is defending against this strain in the real world.分類：communicable disease control, continents and regions, coronavirus, denmark, diseases and disorders, europe, health and medical, infectious diseases, life forms, microscopic life, northern europe, public health, respiratory diseases, vaccination and immunization, viruses...