WorldImmunizationWeek: We all can see the effects of vaccines in our daily lives now because of COVID19, but how did we get here? And how do vaccines actually work? 📽️
Unlike other drugs, which we give to some people when they’re sick, we give vaccines to huge numbers of people while they’re well. That's one reason vaccines go through such extensive testing.
When the immune system detects a virus, it makes antibodies to neutralize it. The goal is to block the virus from binding to healthy cells, so it can’t replicate. To make a flu vaccine for the wider population, researchers just needed a controlled way to generate lots of virus particles, inactivate them, and then harvest them.
Scientists’ latest strategy to fight viruses is using messenger RNA—being deployed for the first time to fight SARS CoV-2, the virus that causes Covid-19.
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