Given the advance of the delta variant in the US, experts warn that it is necessary to increase vaccination rates urgently.
Brett Giroir, a former Under Secretary of Health in the Donald Trump administration, told CNN that if immunization is not increased, the delta variant could continue to evolve.
He assured that a next variant could be just around the corner.
According to data from the US Centers for Disease Control and Prevention, only 49.8% of the population is fully vaccinated against covid-19.
