Dr. Francis Collins says some candidates for a coronavirus vaccine will be ready to start large-scale human trials as early as next month. Scaling up production may start before tests are complete.
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Sarah McCammon is a National Correspondent covering the Mid-Atlantic and Southeast for NPR. Her work focuses on political, social and cultural divides in America, including abortion and reproductive rights, and the intersections of politics and religion. She's also a frequent guest host for NPR news magazines, podcasts and special coverage.