COVID-19 Patient see Lasting Immunity.

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4 years ago

To the immune system, not all germs are equally memorable. But our body’s cells seem to be seriously studying up on the coronavirus.

Disease-fighting antibodies, as well as immune cells called B cells and that T cells are capable of recognizing the virus, appear to persist months after infections have resolved — an encouraging echo of the body’s enduring response to other viruses. Viruses that have already invaded cells, for instance, are cloaked from antibodies, but are still vulnerable to killer T cells, which force infected cells to self-destruct. Another set of T cells, nicknamed “helpers,” can coax B cells to mature into antibody-making machines.

Although researchers cannot forecast how long these immune responses will last, many experts consider the data a welcome indication that the body’s most studious cells are doing their job — and will have a good chance of fending off the coronavirus, faster and more fervently than before, if exposed to it again.

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