Pfizer and BioNTech announced that the FDA approved their sBLA for their 2023-2024 COVID-19 vaccine for patients over 12 years of age, and granted emergency use authorisation for patients from 6 months to 11 years old. The vaccine is an omicron XBB.1.5-adapted monovalent vaccine indicated as a single dose for most patients over 5.
On 26 May 2023, Alnylam sued both Moderna and Pfizer for a third time claiming patent infringement regarding COVID-19 vaccines.