Natural defences against a common cold could offer some protection against Covid-19, too, research suggests.
The small-scale study, published in Nature Communications, involved 52 individuals who lived with someone who had just caught Covid-19. Those who had developed a “memory bank” of specific immune cells after a cold – to help prevent future attacks – appeared less likely to get Covid. Experts say no-one should rely on this defense alone, and vaccines remain key. But they believe their findings could provide useful insight into how a body’s defence system fights the virus.