Johnson & Johnson's Covid-19 vaccine candidate begins Phase 3 trials in the United States today. Trials for the single-dose vaccine will include up to 60,000 adult participants at nearly 215 sites in the US and internationally.
from CNN.com - RSS Channel - HP Hero https://www.cnn.com/2020/09/23/health/johnson--johnson-coronavirus-vaccine-trial-begins/index.html
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