Scientists hunt pandemic hotspots in race to test vaccines COVID19
* Vaccine volunteers need to be put at risk of infectionLONDON/CHICAGO - The first wave of the COVID-19 pandemic may be waning. For vaccine developers, that could be a problem.
A vaccine is seen as essential to ending a pandemic that has killed nearly 370,000 people and infected more than 6 million so far, with world leaders looking at inoculation as the only real way to restart their stalled economies. Vaccine trials work by randomly dividing people into a treatment group and a control group, with the treatment group getting the experimental trial vaccine and the control group getting a placebo.
Collins said U.S. health officials will tap government and industry clinical trial networks in the United States first and use mapping to detect where the virus is most active. They will also consider looking abroad if domestic disease rates fall too far, he said.
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