_______ nation’s institute has launched a study of allergic reactions to the COVID-19 vaccine ?

a) Sweden
b) Switzerland
c) UK
d) US

The US National Institutes of Health (NIH) announced on April 7, 2021 that it has kicked off a study to determine the risk of allergic reactions to the Pfizer-BioNTech and Moderna Covid-19 vaccines.

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taleemified
5 years ago

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