The most contagious subtype of the new coronavirus to date is spreading rapidly in the United States . Variants of the omicron subtype, known as BA.5 and BA.4, are dominating new cases in the U.S., both of which have mutations in the spike protein, the most common SARS-CoV-2 virus to date. The ability to evade vaccine immunity and the version of immunity after infection recovery. The CDC said there is currently no evidence that infected people have more severe symptoms, but its spread could lead to an increase in hospitalizations. BA.5 has also become a mainstream variant in other parts of the world. In addition, according to the Beijing Center for Disease Control and Prevention, some people with new crown infections reported in Beijing recently also carried the BA.5 branch virus.
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