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Infectious disease specialist explains why AstraZeneca's COVID-19 vaccine can vary in effectiveness

Tue Nov 24 , 2020
AstraZeneca announced Monday that its COVID-19 vaccine is up to 90% effective and even shows signs of reducing asymptomatic spread. It’s effectiveness varied during clinical trials, depending on the dosage, but still averaged 70%. Dr. Uzma Syed, an infection disease specialist at New York’s Good Samaritan Hospital Medical Center and […]

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