Oxford-AstraZeneca Covid-19 vaccine shot is 79% effective in Chile Peru and US trials

AstraZeneca says the COVID-19 vaccine it developed in cooperation with Oxford University was 79-percent effective in preventing symptomatic illness in a large trial in the United States, Chile and Peru, paving the way for its long-awaited application for US approval. The vaccine was found to be 100 percent effective against severe or critical disease and […]