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Now that months have passed since getting boosted against COVID, you may be wondering if the shot is still protecting you. Here’s everything experts do — and don’t — know.

Current vaccines teach T cells to fight Omicron - Scientists at La Jolla Institute for Immunology (LJI) have found that four COVID-19 vaccines (Pfizer-BioNTech Moderna J&J/Janssen and Novavax) prompt the body to make effective long-lasting T cells...

Scientists at La Jolla Institute for Immunology (LJI) have found that four COVID-19 vaccines (Pfizer-BioNTech, Moderna, J&J/Janssen, and Novavax) prompt the body to make effective, long-lasting T cells against SARS-CoV-2.

Study highlights the importance of T cell cross reactivity in stopping severe COVID-19 infections Researchers at La Jolla Institute for Immunology (LJI) have found that T cells from people who have recovered from COVID-19 or received the Moderna or Pfizer-BioNTech vaccines are still able to recognize several concerning SARS-CoV-2 variants. Their new study, published online on July 1, 2021 in Cell Reports Medicine, shows that both CD4+ "helper" T cells and CD8+ "killer" T cells can still recognize mutated forms of the virus. This reactivity is key to the body's complex immune response to the ...