From what I understand you build some resistance as you are exposed to multiple variants of the same flu virus so it's quite possible this would hold for corona

From what I understand you build some resistance as you are exposed to multiple variants of the same flu virus so it's quite possible this would hold for coronavirus making refection less likely to lead to a severe infection. Lets also not forget that there is likely to be well studied effective anti-virals at some point like we have for the flu today.