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Vaccine from a concept to a phase one trial. This took less than six weeks. Reporter phase two trails are under way and phase three, which will require 30,000 participants, to test safety and efficacy, will begin july 27. A phase one volunteer, neil browning, who lives in seattle, was one of the first people in the world to get the vaccine. Its been a few months since your last dose. How have you been feeling . Completely normal. The only real side effect was each morning after each of the two injections, my upper arm was sore. Reporter he received the lwest of three possible vaccine doses during the trial. Saying that all 45 had all three dosage levels had the same response is like a grand slam. It knocks it out of the park. 100 efficacy is something you want but rarely get in Something Like this. What percentage of the population would need to be de immunitisome 60, 70 . Reporter they are on track to deliver 500 million doses every year, beginning in 2021. Dr. Anthony fauci is cautio

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