AstraZeneca said its final trials of the Covid-19 vaccine were "extremely effective" in preventing disease.

On Monday, the team of researchers reported that a vaccine developed by the company and the University of Oxford had prevented 70% of people from contracting the emerging coronavirus.

Lead researcher Dr. Andrew Pollard said that scientists are happy with the results, indicating that researchers have found that if people are given half a dose followed by a full dose, instead of two full doses, the prevention rate rises to 90%, and Pollard continued: “These results show that we have. An effective vaccine will save many lives. "

Two other drug companies, Pfizer and Moderna, announced last week that preliminary results from late-stage trials showed that COVID-19 vaccines were nearly 95% effective.