The Centers for Disease Control and Prevention listed the COVID-19 delta variant as one of its "variants of concern" (VOCs) on June 15. According to the CDC, VOCs can be more contagious, more ...
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Original COVID-19 vaccination did not stop immune system from fighting variants, finds study
Prior COVID-19 vaccination did not stop the immune system from mounting a protective response to the delta and omicron strains, though new mutation-specific antibody production dipped slightly, ...
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