by University of Gothenburg Th1 cells remain active against SARS-CoV-2 for at least 20 months after infection. Credit: Proceedings of the National Academy of Sciences (2022). DOI: 10.1073/pnas.2203659119 Patients infected with SARS-CoV-2 develop protective immune responses, mediated by virus-specific T cells and antibodies, shortly after the infection. There is concern, however, that immunity does not persist over...
