SPRINGFIELD - The Illinois Department of Public Health (IDPH) announced today it is fully adopting updated Centers for Disease Control and Prevention (CDC) masking recommendations to protect against COVID-19 and the Delta variant. CDC recommends that everyone, including fully vaccinated individuals, wear a mask in public indoor setting in areas with substantial and high transmission. CDC is also recommending universal indoor masking for all teachers, staff, students, and visitors to K-12 schools, regardless of vaccination status.