evidence: The Food and Drug Administration (FDA) is advising healthcare providers who administer the Moderna COVID-19 Vaccine (2023-2024 Formula) to individuals 6 months through 11 years of age to ensure that the correct volume of the vaccine (0.25 mL) is withdrawn from the vial, so that the correct dose is administered to the vaccine recipient. [...] The FDA posted information regarding the formula for COVID-19 vaccines for the 2023-2024 fall and winter seasons. The FDA has advised manufacturers seeking to update their COVID-19 vaccines that they should develop vaccines with a monovalent XBB.1.5 composition. [...] Today, the U.S. Food and Drug Administration approved the first COVID-19 vaccine, known as the Pfizer-BioNTech COVID-19 Vaccine, now marketed as Comirnaty (koe-mir'-na-tee), for the prevention of COVID-19 disease in individuals 16 years of age and older.