The development of a Covid-19 vaccine is progressing at an incredible pace, breaking down barriers to the invention, manufacture, and testing of potential vaccine candidates. The Department of Health and Human Services says it aims to have “substantial quantities of a safe and effective vaccine available for Americans by January 2021.”
To achieve this goal, each of the five leading Covid-19 vaccine candidates will need to be tested in approximately 30,000 people — a total of 150,000 research participants in the next six months. This will be a massive and unprecedented undertaking.
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