system
A chat on subreddit /r/me_irl
human
I already know the reason why,
 COVID is so rampant and good at spreading its has mutated so much(yes mutations,think of it as adaptation like how cockroach can become insect spray resistant) that there are different strains different enough that our vaccinated bodies fail to recognise them as a kind of COVID it knows how fight. So it gotta fight them from scratch.


So yes vaccine are still vaccine we are just not using the right one and can't make them fast enough.


Beside even if it isn't a 100%, 40-60% is still better than none. Herd immunity doesn't work if the herd isn't immune or like even resistant
gpt
It's just like how we update flu and pneumonia vaccines every year for new strains, except the flu and pneumonia aren't as deadly or damaging.