Tag Archives: covid booster

How effective are vaccines against omicron? An epidemiologist answers 6 questions

Understanding how much protection a vaccine offers is not as simple as it sounds. Andriy Onufriyenko/Moment via Getty Images Melissa Hawkins, American University The pandemic has brought many tricky terms and ideas from epidemiology into everyone’s lives. Two particularly complicated concepts are vaccine efficacy and effectiveness. These are not the same thing. And as time goes on and new variants …

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