3 ms·
Immunity doesn't last for the common cold because there's so many viruses that cause it.
by xlm1717 6y ago
Immunity doesn't last for the common cold because there's so many viruses that cause it.
- AstralStorm 6y agoUhm, about 6-20 very common ones,, though total count is close to 200. And these have variants. But even within just betacoronavirus 1 OH49 (10% of colds or thereabouts) immunity is not persistent. It is just mild enough. There's another one alphacoronavirus in about 5% of colds that is much worse. (Not counting SARS group.) Mind you parallel infection with multiple viruses is common.