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Giving 2 Doses Of Different COVID-19 Vaccines Could Boost Immune Response – NPR

Using two different COVID-19 vaccines is a bit like giving the immune system two pictures of the virus, maybe one face-on and one in profile.

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Mixing different kinds of COVID-19 vaccines might help boost immune responses, but the idea has been slow to catch on.
Angela Weiss/AFP via Getty Images
Typically, if you get a COVID-19 vaccine that requires two doses, you should get two of the same vaccine. Two Pfizer shots, or two Moderna shots. Not one and then the other.
But in the future, that could change, either by necessity or by design.
This idea of using two types of vaccines isn’t a new concept. It’s known as heterologous vaccination,…

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