Evusheld was a key antibody treatment taken by people with weak immune systems as an added layer of protection.
Many take Evusheld as an additional layer of protection because the vaccines do not trigger a strong immune response for them.
The latest omicron subvariants could cause a surge of breakthrough infections and reinfections, a new study finds.
Pfizer said the booster triggered more antibodies against omicron BQ.1.1, BA.4.6, BA.2.75.2 and XBB.1 in adults older than 55 compared to the original vaccines.
President Biden cautioned that the immunocompromised are at heightened risk this winter and should talk to their physician about precautions.
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