A laboratory study finds that blood serum drawn from people previously vaccinated or naturally infected show 'significantly reduced' defense against two variants of the novel coronavirus SARS-CoV-2. Researchers said that their findings emphasize the importance of vaccinations combined with maintaining public health measures to cut off the spread of the SARS-CoV-2 virus.
from Top Health News -- ScienceDaily https://ift.tt/3kAJaHw
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