In their study of recovered COVID-19 patients, the researchers determined that SARS-CoV-2-specific CD8+ T-cell responses remained largely intact and could recognize virtually all mutations in the variants studied. While larger studies are needed, the researchers note that their findings suggest that the T cell response in convalescent individuals, and most likely in vaccinees, are largely not affected by the mutations found in these three variants, and should offer protection against emerging variants.

T cells recognize recent SARS-CoV-2 variants — https://www.nih.gov/news-events/news-releases/t-cells-recognize-recent-sars-cov-2-variants