Is it impossible to get a cold twice in one season? If so, why is catching covid twice a bad thing, especially if the second time is a lot milder than the first time, even for people who experience mild symptoms the first time?

Do you not understand that this means you can spread it twice?

Seemingly not at same rate tho. I guess some specialist can explain it better, but afaik there are some viruses and vaccines where you can spread and some you don’t.

For covid there’s no data yet, but my hunch says it reduces spread only slightly.