We are in parallel making doses, making vaccine in anticipation that we'll be able to show it's working and be able to start deploying it by the end of this year, company's research chief Dr. Gregory Glen told a virtual press conference in Melbourne from Novavax' headquarters in Maryland. Representational Image About a dozen experimental vaccines are in early stages of testing or poised to start, mostly in China, the U.S. and Europe. It's not clear that any of the candidates ultimately will prove safe and effective.