A person receives a coronavirus disease (COVID-19) test as the Omicron coronavirus variant continues to spread in Manhattan, New York City, U.S., December 22, 2021.
The omicron BQ coronavirus subvariants have risen to dominance in the U.S. as people gather and travel for the Thanksgiving holiday, putting people with compromised immune systems at increased risk.
The omicron BA.5 subvariant, once dominant, now makes up only a fifth of new Covid cases.
The BQ subvariants are more immune evasive and likely resistant to key antibody medications, such as Evusheld and bebtelovimab, used by people with compromised immune systems, according to the National Institutes of Health.
President Joe Biden, in an October speech, told people with compromised immune systems that they should consult with their physicians and take extra precautions this winter.