COVID-19 vaccines activate long-lasting immune system T-cells that target coronavirus variants of concern, including Delta and Omicron, new research shows.
The research team at the La Jolla Institute for Immunology in California studied adults who were fully vaccinated with the Pfizer, Moderna, Johnson & Johnson or Novavax vaccines, but had not received boosters.
“The vast majority of T-cell responses are still effective against Omicron,” study co-leader Alessandro Sette said in an institute news release.
