US is ‘losing time’ in vaccination race as Delta variant becomes more pervasive, expert says

Covid-19 vaccination rates are down and cases are on the rise, exacerbated by the more transmissible Delta variant — and an expert says the key to winning the race against the spread is getting more Americans vaccinated.Covid-19 vaccination rates are down and cases are on the rise, exacerbated by the more transmissible Delta variant — and an expert says the key to winning the race against the spread is getting more Americans vaccinated.