Vaccines are one of humankind’s best achievements, and we should all be shouting about it | katlday

Imagine aliens finally get around to visiting our planet…

“About two hundred years ago,” explains the alien scientific advisor – let’s call him Spuck – “humans developed a way to prevent disease which they call vaccination. It’s really quite fascinating. They use a needle to place a tiny quantity of a fluid into the muscle under the skin of their arm or leg. The substances are then absorbed into their bodies and cause their highly-evolved immune systems to generate an immune response without, and this is really quite ingenious, Captain, their having to contact the actual diseases or suffer…

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