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A woman wearing a light blue medical gown inserts a cotton swab into a woman's nose who is sitting and wearing a black hat.
BA.5 Will Cause 'Even Greater Surge,' Warns UCSF's Wachter of Highly Infectious COVID Subvariant
While COVID-19 restrictions have eased around the US, experts have discovered a new omicron subvariant, named BA.5, that appears to be more infectious and can evade immune responses.