- First COVID-19 Vaccine Tested in US Poised for Final TestingSnopes.com
- Phase 1 results show coronavirus vaccine safe, induces immune responseGrand Forks Herald
- U.S. COVID-19 vaccine program to start manufacturing by late summer, says U.S. officialReuters
- Swiftly waning COVID-19 immunity poses vaccination challengeswissinfo.ch
- Moderna COVID-19 vaccine enters final stage trial this monthGMA News
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