I feel entitlement-vibes

> This is illiterate nonsense. "Natural immunity" fades within months from the infection.

And that's ill-informed arrogance.

The reason the common cold (AND CoVid!) is usually harmless is because it is so common. It comes round every few months in a slightly new variant and re-infects you. And because your body remembers the old variant it fights the new one off with ease. So your natural immunity IS as close to perfect as it can get. The virus is constantly changing, your immunity is constantly changing, there's a balance that shifts back and forth.

HINT: Even when CoVid was brand new, one of the factors that helped it spread so fast, was because the MAJORITY of victims did not know they'd been infected. It was just the unfortunate older people who got hit so hard because it was too different from anything they'd ever met before.

Cheers,

Wol