Re: Coronavirus
Any vaccine only prompts the immune system to react as if there was a real version of the virus present. It still takes time for the immune system be able to deal with it. People will still have to self-isolate/be in lockdown for a further 1 or 2 weeks after getting the vaccine. Otherwise in that time they could be exposed to the full real version and suffer from that and spread it to others. Not an instant overnight fix.
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