“Effective Sept. 5, individuals working in these settings who are unable or unwilling to receive their first dose of vaccine will be required to get tested for COVID-19 at least once a week and [Illinois Department of Public health] and [Illinois State Board of Education] may require more frequent testing in certain situations, like in an outbreak.” Beginning Monday, masks will be required in all places for people older than 2 years old “regardless of vaccination status,” the governor said. “Masks work, period,” Pritzker said.