America is now on track to vaccinate all adults by July 4
July 4 this year could also be America’s Independence Day from Covid-19. At current rates, America is administering nearly 2.8 million Covid-19 vaccine doses a day — roughly enough to vaccinate every adult (18 and older) in the country by July 4. That would mean 80 percent of the population would be able to get a vaccine. We don’t know for certain if that’s enough for herd immunity, when enough of the population is immune…