‘Most transmissible’ COVID variant yet is spreading in California. What we know about XBB.1.5
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As the third year of the
nears an end, the
coronavirus continues to evolve
and prove that it has more tricks up its sleeve.
The highly contagious XBB.1.5 strain, the latest in a succession of omicron subvariants that was first detected in the U.S. in October, is quickly spreading.