From the Florida AG on the new booster:
https://floridahealthcovid19.gov/wp-content/uploads/2023/09/20230913-booster-guidance-final.pdf
"A new mRNA COVID-19 booster was approved on September 11, 2023, by the federal government.
While the initial mRNA COVID-19 vaccines were authorized by the United States Food and Drug
Administration (FDA) utilizing human clinical trial data, the most recent booster approval was granted in
the absence of any meaningful booster-specific clinical trial data performed in humans. In both cases
the federal government has failed to provide sufficient data to support the safety and efficacy of the
COVID-19 vaccines. Health care providers are expected to include the information in this guidance in
discussions with patients regarding the mRNA COVID-19 vaccines."
"Based on the high rate of global immunity and currently available data, the State Surgeon
General recommends against the COVID-19 booster for individuals under 65. Individuals 65 and
older should discuss this information with their health care provider, including potential
concerns outlined in this guidance."