Health

Immune system has long-term defenses after mild COVID-19; children may be key carriers of virus variants

Health

Immune system has long-term defenses after mild COVID-19; children may be key carriers of virus variants

Months after recovery from mild COVID-19, when antibody levels in the blood have declined, immune cells in bone marrow remain ready to pump out new antibodies against the coronavirus, researchers reported on Monday in Nature. Upon infection, short-lived immune cells are generated quickly to secrete an early wave of protective antibodies. As the immune cells die out, antibody levels decline. But a pool of these immune cells, called long-lived plasma cells.

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