coronavirus, Microsoft founder Bill Gates said a vaccine in the United States may come by the the end of this year. “None of the vaccines are likely to seek approval in the US before the end of October," the billionaire philanthropist told CNBC.“I do think once you get into, say, December or January, the chances are that at least two or three will (seek approval) — if the effectiveness is there," the Microsoft co-founder said.“And so we have these phase three trials that are going on.