(CNN) More than 98% of US residents now live in an area where there is a "high" or "substantial" risk of Covid-19 community transmission, up from 19% of residents only a month ago. This sharp turn has been driven in large part by the highly infectious Delta variant and low vaccination rates in many regions. The latest figures from the CDC show an alarming rise in the number of counties that are considered at high risk of community transmission. A look at the past five weeks shows just how rapidly community transmission has increased across the country. The increase in community transmission has led to renewed mask mandates and an urgent push for vaccinations across the country, especially in areas where vaccination rates are low.

Source: CNN August 11, 2021 14:37 UTC