Pfizer says ommicron-fighting COVID-19 shots trigger strong immune response

The omicron-targeted vaccine from Pfizer Inc. and a hybrid injection that fights both the parent strain and ommicron elicited strong immune responses in a study that could pave the way for the next generation of COVID-19 vaccines.

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Pfizer and its vaccine partner, Germany’s BioNTech SE, said on Saturday that both new vaccine candidates had a safety and tolerability profile similar to the original injection.

The companies said the data will be discussed with regulators with the aim of quickly introducing a more customized booster shot to address current and future variants.

Data from the late phase of the study showed that a booster dose of both omicron-modified vaccine candidates elicited a “significantly higher” immune response against omicron subvariant BA.1 compared to the current COVID-19 vaccine.

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