Quote:
Originally Posted by MahomesMagic
That's not the definition.
They name vaccines which aren't.
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It seems to be exactly what you think the definition is:
which means they reduce symptoms but people can still be infected by the viruses.
People can still be infected means less than 100% efficacy and not a sterilizing immunity vaccine, no?
Quote:
Originally Posted by MahomesMagic
Most human vaccines, such as for polio, and the measles, mumps and rubella (MMR) vaccine are perfect vaccines, so they also stop transmission of the disease in question
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The vaccines for those illnesses don't provide 100% efficacy, either. People can and do still get those illnesses after vaccination. It's just very rare. So no, they aren't perfect:
https://www.cdc.gov/vaccines/vpd/mmr/public/index.html
One dose of MMR vaccine is 93% effective against measles, 78% effective against mumps, and 97% effective against rubella. Two doses of MMR vaccine are 97% effective against measles and 88% effective against mumps. MMR is an attenuated (weakened) live virus vaccine.