EYECARE: Coronavirus BRIEFING: Crisis Response Tactics Pfizer Says Updated COVID Shot Generated Strong Reaction vs New Variant in Mice By Staff Monday, September 11, 2023 8:05 AM Pfizer on Wednesday said the updated Pfizer-BioNTech COVID-19 vaccine expected to be used this fall elicited a strong antibody response against the highly mutated BA.2.86 subvariant of the coronavirus in a preclinical study in mice.The Centers for Disease Control and Prevention has previously indicated that BA.2.86 may be more capable of causing infection in people who previously had COVID or were vaccinated with previous shots. Head over to Medscape to read the full story.