The results come as an increase in so-called "breakthrough" infections caused by the Delta variant among vaccinated individuals continues to raise questions about whether the vaccines offer broad protection against newly arising variants.
from Top Health News | Latest Health & Healthcare Industry Information and Updates: ET HealthWorld : ETHealthworld.com https://ift.tt/3iPaLEH
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» COVID-19 vaccines effective against most SARS-CoV-2 variants, says study
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