FILE - Dr. Stephaun Wallace, who leads the global external relations strategies COVID-19 Prevention Network at the Fred Hutchinson Cancer Research Center, receives his second injection from Dr.
Tia Babu during the Novavax COVID-19 vaccine phase 3 cli While more than half of the U.S. population has had at least one COVID-19 vaccine dose, less than 1 percent of people in the developing world have had one shot, according to Our World In Data.Novavax's study involved nearly 30,000 people ages 18 and up in the U.S.
and Mexico. Two-thirds received two doses of the vaccine, three weeks apart, and the rest got dummy shots.There were 77 cases of COVID-19 — 14 in the group that got the vaccine and the rest were in volunteers who received dummy shots..