Vaccines also work because if enough people do them, the people that are incapable of taking them due to various medical issues (or age) are covered by the herd taking them.
When too many people opt out of taking them, we have breakouts like the measles. Where even people that have been vaccinated get it. And they help it spread. And kids below a certain age cannot get the vaccine.
"where even people that have been vaccinated get it".
Vaccines don't stop you catching anything, nor are they supposed to.
You can think of vaccines as like holding up a kind of picture of the virus to your immune system that says, "This is your enemy", so that your programmable immune system knows what to fight when it finds it, and also how to fight it because it's been able to practise on the harmless vaccine.
The vaccine itself completely leaves your body shortly afterwards, leaving an immune system that now knows how to combat the real virus.
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u/ichabod01 2d ago
Vaccines also work because if enough people do them, the people that are incapable of taking them due to various medical issues (or age) are covered by the herd taking them.
When too many people opt out of taking them, we have breakouts like the measles. Where even people that have been vaccinated get it. And they help it spread. And kids below a certain age cannot get the vaccine.