Colorado officials have moved to require proof of COVID-19 vaccination from individuals attending large indoor, unseated events in certain jurisdictions, saying the measures will “prevent superspreader events.” In an amended public health order released on Sunday, the Colorado Department of Public Health and Environment (CDPHE) states that the measures will impact Arapahoe, Adams, Boulder, and Jefferson counties, as well as the City and County of Denver, and the City and County of Broomfield. The protocols, which take effect on Friday, require that everyone be vaccinated at indoor, unseated events with more than 500 people. The order also recommends that counties adopt vaccine requirements for employees in high-risk settings. “I am grateful for the counties that are coordinating with the state to slow the spread of the virus. Large venues and local governments are part of the solution to ending the pandemic,” Jill Hunsaker Ryan, CDPHE executive director, said in a …