COVID-19 cases are rising rapidly in the United States as the highly contagious Delta variant dominates and vaccinations stagnate, data showed on Wednesday. The seven-day-average of new cases was 13,859 as of July 6, up 21% compared to two weeks earlier, according to the Centers for Disease Control and Prevention (CDC). Cases attributed to the most recent days might rise further because of a reporting lag following the July 4 holiday weekend. Despite having among the highest availability of vaccines of any country, America’s immunisation campaign has dropped off steeply since April.