Bletchleyite
Veteran Member
And the vaccine has achieved thus far?
The fact is that the human immune system is way more advanced and sophisticated than any of our scientists could ever hope to be. This is why herd immunity is still the most reliable model available to us. Indeed, many vaccines actually need the immune system to react to deactivated or dead versions of the viruses to be effective.
ALL vaccines work in that way, not just many of them! The idea of them is that they train some aspect of the immune system to respond to something similar to the thing you're vaccinating against that doesn't make you sick, or only makes you a bit sick.
The immune system of course sometimes makes mistakes and develops reactions against things unnecessarily - allergies - so this needs doing carefully, which is why you can't just whack one out. If your vaccine was effective at killing COVID but caused a cytokine storm if exposed to, say, an apple, you'd have a problem. (This is not as far fetched as it sounds - if you are bitten by the Lone Star Tick the saliva of that causes you to become allergic to meat due to a sugar in the saliva that is also in near enough all meats! That is basically the same thing as happens with a vaccine, but it is clearly not desirable even if you're vegan!)