The announcement Monday from Pfizer and its German partner BioNTech that their coronavirus vaccine appears to be 90% effective thrilled medical experts around the world and presented a glimmer of hope ...
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Different types of COVID-19 vaccines: How they work
COVID-19 vaccines lower the risk of getting sick, seriously ill or dying from the disease. But how do the different types of COVID-19 vaccines work? Each COVID-19 vaccine causes the immune system to ...
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