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Covid-19 booster shots: Everything there is to know right now

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The first thing you need to know about Covid-19 booster shots is that nothing about them has been set in stone. There is no guarantee we will need them one day. There is no guarantee we won’t. To make matters murkier, it’s also unclear just what a booster shot would have to accomplish, should it become necessary. If scientists discover that immunity to the coronavirus starts to wane months or years after vaccination, a booster could be deployed to extend that immunity. If a new variant emerges that is impervious to the immunity offered by our current vaccines, a booster would be required to br…

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