A huge study of the Novavax COVID-19 vaccine candidate is getting underway in the US today.
This is the fifth drug to reach final-stage testing south of the border.
About 30,000 volunteers are needed to prove if this vaccine, which is a different kind than its Pfizer and Moderna competitors, really works and is safe.
"If you want to have enough vaccine to vaccinate all the people in the U.S. who you'd like to vaccinate, up to 85% or more of the population, you're going to need more than two companies,'' Dr. Anthony Fauci, the top U.S. infectious disease expert, told The Associated Press.The Novavax candidate uses lab-grown harmless copies of the spike protein that coats the coronavirus to train the body to recognize if the real virus comes along.