Where Should Covid-19 Vaccines Be Tested? It's a Moving Target

Developers need to test in hotspots, but those keep changing. And they must avoid ethical problems, like testing in low-income areas but only selling in rich ones.

Where Should Covid-19 Vaccines Be Tested? It's a Moving Target
Developers need to test in hotspots, but those keep changing. And they must avoid ethical problems, like testing in low-income areas but only selling in rich ones.
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