هناك أكثر من 5.81 مليون حالة التهاب رئوي في COVID-19, الولايات المتحدة الأمريكية. The US CDC said that the close contacts have no symptoms and can be questioned without testing. The US media reported on the 25th local time that the CDC recently revised its guidance on novel coronavirus testing, and people who have been exposed to the virus environment but …