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Katherine O'Brien

Katherine-obrien, Latest Marathi News

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Katherine "Kate" L. O'Brien is a Canadian American pediatric infectious disease physician, epidemiologist, and vaccinologist who specializes in the areas of pneumococcal epidemiology, pneumococcal vaccine trials and impact studies, and surveillance for pneumococcal disease.

Health : 30 to 40 countries unable to give 2nd Covid shots: WHO