Researchers here are studying the impact mixing different Covid-19 vaccines, including some not currently under the national vaccination programme, can have on the body’s immune system.
SINGAPORE - Researchers in Singapore arestudying the impact mixing different Covid-19 vaccines, including some not currently under the national vaccination programme, can have on the body's immune system.
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SINGAPORE (The Straits Times/Asia News Network): Researchers in Singapore are studying the impact mixing different Covid-19 vaccines, including some not currently under the national vaccination programme, can have on the body's immune system.