Booster shots offset some of omicron's immune evasion tactics

Although omicron subvariants of the SARS-CoV-2 pandemic coronavirus have evolved to evade antibody responses from the primary COVID-19 vaccine series, a new laboratory study suggests current vaccine boosters may elicit sufficient ...

Diseases, Conditions, Syndromes

Pfizer says tweaked COVID-19 shots boost omicron protection

Pfizer announced Saturday that tweaking its COVID-19 vaccine to better target the omicron variant is safe and works—just days before regulators debate whether to offer Americans updated booster shots this fall.


COVID shots still work but researchers hunt new improvements

COVID-19 vaccinations are at a critical juncture as companies test whether new approaches like combination shots or nasal drops can keep up with a mutating coronavirus—even though it's not clear if changes are needed.

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