Usa biotechnology firm moderna starting phase 3 clinical trails July first week..now recruiting 30000 peole in usa for phase 3 icluding kids and elderly ...this group is most advanced in clinical trails now in whole world ... if this group is successful we could see vaccine in 2020 itself becuae they are already well into phase 2 ..high infection rates in usa reality helping to speed up trails ..that is important because some vaccine like Oxford university completely failed in animal trails itself..