Pfizer Says Can Change Vaccine to Target Omicron Variants

Pfizer can make changes to its vaccine against COVID-19 to allow it to better target the omicron variant of the coronavirus, the company announced on Saturday. The changes work and the vaccine remains safe with the changes, according to the company, The current vaccine used in the US still protects against severe cases of the virus, but the formulation is not as effective against the latest variants of the dominant omicron variant. The announcement comes as the US Food and Drug Administration considers whether to provide Americans with a vaccine booster shot modified to protect against the latest iterations of the virus.