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AstraZeneca Says Its Covid-19 Vaccine Is Highly Effective | NBC Nightly News
AstraZeneca says its COVID-19 vaccine is safe and highly effective after U.S. clinical trial
AstraZeneca says COVID-19 vaccine is 'highly effective'
AstraZeneca says COVID-19 vaccine ‘highly effective’ at prevention
AstraZeneca says COVID-19 vaccine ‘highly effective’
AstraZeneca says COVID-19 vaccine ‘highly effective’ at 70%
AstraZeneca says COVID-19 vaccine ‘highly effective’
AstraZeneca: COVID-19 vaccine ‘highly effective’ prevention
AstraZeneca Says COVID-19 Vaccine ‘Highly Effective’
AstraZeneca Says Its COVID-19 Vaccine Shows It Is 'Highly Effective'
AstraZeneca: COVID-19 vaccine 'highly effective' prevention
Another: AstraZeneca COVID-19 vaccine ‘highly effective’