U.S. AstraZeneca vaccine trial will clear confusion on how well it works - U.S. scientist

U.S. AstraZeneca vaccine trial will clear confusion on how well it works - U.S. scientist

Source: 
Reuters
snippet: 

A top U.S. scientist overseeing COVID-19 vaccine trials expects a large U.S. study to determine how effective AstraZeneca’s experimental inoculation is, following perplexing results from other trials released by the company and partner Oxford University.