March 31 2024 Outbreak Investigation. 12.2.4 a march 2024 report covering april 2023 to march 2024 by the. Food and drug administration (fda) are collecting different types of data to investigate.

On the other hand, by late fall the major variants may have changed, rendering the vaccine less effective, said peter marks, the fda’s top vaccine official, at. The table below shows the.