FDA Advisers Discuss Updates to Covid Vaccines for Fall and Omicron Variants.

The FDA's independent panel of advisors raised doubts about the need to "periodically" update Covid vaccines, noting that it's unclear if the virus is seasonal like the flu. Several advisors cautioned against calling Covid seasonal like the flu, as Covid's spread has often been erratic and the virus constantly mutates into new variants. The worries are also the latest pushback against the FDA's proposed shift to annual Covid shots earlier this year – a simplified approach to vaccination that would involve yearly updates to the jabs.