90% effective WHO said Nuvaxovid was around 90-percent effective at reducing symptomatic cases of Covid-19 in two major clinical studies, one in Britain and the other in the United States and Mexico, involving more than 45,000 people.
In a separate document, WHO's Strategic Advisory Group of Experts on Immunisation recommended the new vaccine for use in people over the age of 18, with an interval of three to four weeks between the two doses. "The vaccine should not be administered with an interval of less than three weeks," it warned.
It can be kept at refrigerated temperatures between 2 and 8 degrees Celsius, giving it a logistical advantage in difficult-to-access regions over the mRNA vaccines, which must be stored at ultra-low