Say you got some pathogen inside you, and it’s starting to replicate and your immune system isn’t prepped with the antibodies. Does it ever happen then that infection still gets nowhere because of reasons other than you consciously recognizing that you were exposed and taking some meds early on?
In: Biology
Yes. Your immune system has the perfect weapon for every disease ever.
It’s just some are the equivalent of being waaaay on the back shelf so take a while to find.
Getting a vaccine will essentially prep that weapon and bring it to a more accessible location for when you do get the disease.
It’s not quite that simple as the immune system is one of the most complex biological systems we know of, and we still don’t completely understand all the interaction.
Kurzgesagt did a good understandable overview of [how it works](https://www.youtube.com/watch?v=lXfEK8G8CUI), and why its preped for anything.
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