KGO ABC World News Tonight With David Muir May 8, 2020 00:43:00
Neal browning was among the first 45 participants. >> hopefully this is the first time that this type of vaccine can be successful. >> reporter: next, theyll test the vaccines effectiveness, with 600 healthy americans. >> so many volunteers on that front. and kaylee, news tonight from the nih, as well. director collins now weighing in on how long immunity might last if youve been exposed to the virus? >> reporter: thats right, david. director collins saying he hopes immunity lasts more than a ye...
Neal Browning David Pressing Thats Right Tracking Someone Kaylee Hartung President Trumps First National Security Adviser
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