Prepared by the Colorado COVID-19 Modeling Group
Colorado School of Public Health: Andrea Buchwald, Elizabeth Carlton, Debashis Ghosh, Irina Kasarskis, Jonathan Samet, Emily Wu; University of Colorado School of Medicine: Kathryn Colborn; University of Colorado-Boulder Department of Applied Mathematics: Sabina Altus, David Bortz; Colorado State University: Jude Bayham

For Contact:

Effective reproductive number (Re) reflects hospitalization data through 09/13/2021. In regions with smaller populations, reported cases are also used to generate these estimates. The prevalence of infections and percent of the population infected is estimated for 09/06/2021. Due to lags between infection and hospitalization, estimates of transmission control and the effective reproductive number represent the spread of infections through approximately 08/31/2021.

Boulder
Are infections increasing or decreasing?
How many people are infectious?
Re Infections areโ€ฆ Prevalence per 100,000 People infectious Percent of Population Estimated Immune
1.1 Increasing 732 1 in 137 71.2
Due to lags between infection and hospitalization, the estimated effective reproductive number (Re) reflects the spread of infections approximately two weeks prior to the data of the last observed hospitalization.