الصفحة الرئيسيةZee News :World Chinese health experts warn of new Covid-19 variants as highly transmissible Omicron strain BF.7 spreads like wildfire byProtijogi -ديسمبر 21, 2022 Highly transmissible Omicron strains, mainly BA.5.2 and BF.7, are currently driving China's Covid-19 surge. Tags: Zee News :World Facebook Twitter