Three potential Covid-19 vaccines make progress in early-stage testing with volunteers in China and the US, but it’s still a long road ahead to prove if they actually work
Small bottles labeled with"Vaccine" stickers stand near a medical syringe in front of displayed"Coronavirus COVID-19" words in this illustration taken April 10, 2020.
In the US, a shot made by the National Institutes of Health and Moderna Inc isn’t far behind. The first person to receive that experimental vaccine last month returned to a Seattle clinic on Tuesday for a second dose. Initial tests focus on safety, and researchers in both countries are trying out different doses of different types of shots.
Looking ahead, Fauci said if the new coronavirus continues to circulate widely enough over the summer and fall, it might be possible to finish larger studies slightly sooner than the 12 to 18 months he'd originally predicted — maybe toward "mid to late winter of next season.” “Although we are in an emergency, we cannot lower the standards of safety and effectiveness in the reviews of vaccines,” said Wang Junzhi, a Chinese biopharmaceutical expert. “The public is paying huge attention."
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