Pfizer Omicron Xbb.1.5

Pfizer Omicron Xbb.1.5. Xbb.1.5 was first identified in the united states in new york in october 2022. What the medication is used for.

Xbb.1.5 was first identified in the united states in new york in october 2022. Xbb.1.5 is derived from the omicron variant ba.2, and while.