What was your definition of vaccine? Vaccines have never 100% prevented people from contracting a virus. A virus is a living thing that once it enters your body and body has to react. If your body doesn’t recognize it is bad, it may ignore it and allow it to replicate and spread without any resistance. If your body knows it is bad, it starts to put up a resistance and fight it soon as it sees it. Both bodies “contracted the virus” but the one who got a vaccine knows when it sees it to start working against it sooner; hopefully preventing it from spreading to much or causing any serious symptoms.
I like to think of it like making the opposition wear a red shirt. When you see a red shirt, you know it’s an invader, without the vaccine, you don’t know what to look for, so you let the red shirt population grow and spread until you notice that the red shirts are causing problems, then you recognize them as an invader, but they are spread throughout the body and ingrained into the population. A lot more opposition… Thus the battle isn’t as quickly won, or if unlucky, the damages get to severe before being able to clear out all the invaders, and you die.
What was your definition of vaccine? Vaccines have never 100% prevented people from contracting a virus. A virus is a living thing that once it enters your body and body has to react. If your body doesn’t recognize it is bad, it may ignore it and allow it to replicate and spread without any resistance. If your body knows it is bad, it starts to put up a resistance and fight it soon as it sees it. Both bodies “contracted the virus” but the one who got a vaccine knows when it sees it to start working against it sooner; hopefully preventing it from spreading to much or causing any serious symptoms.
I like to think of it like making the opposition wear a red shirt. When you see a red shirt, you know it’s an invader, without the vaccine, you don’t know what to look for, so you let the red shirt population grow and spread until you notice that the red shirts are causing problems, then you recognize them as an invader, but they are spread throughout the body and ingrained into the population. A lot more opposition… Thus the battle isn’t as quickly won, or if unlucky, the damages get to severe before being able to clear out all the invaders, and you die.