this post was submitted on 17 Aug 2023
943 points (93.2% liked)

World News

32314 readers
515 users here now

News from around the world!

Rules:

founded 5 years ago
MODERATORS
you are viewing a single comment's thread
view the rest of the comments
[–] [email protected] 2 points 1 year ago

Because immunity varies by disease.

Chicken pox? Pretty much one and done. COVID? Falls off rapidly after 3 months, whether you catch it or get the vaccine

Plus, every mutation is a dice roll on how much existing immunity will apply. It could be exactly the same as the last strain, or the old immunity might not help at all