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1 comment(s). Last comment by bisonbull 2020-07-15 06:03

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Posted by bisonbull > 2020-07-15 06:03 | Report Abuse

LONDON (Reuters) - Emerging evidence that the body's immune defence against COVID-19 may be short-lived makes it even harder for vaccine developers to come up with shots fully able to protect people in future waves of infection, scientists said on Tuesday.

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