The Illinois Department of Public Health (IDPH) is adopting the Centers for Disease Control and Prevention (CDC) recommendation to shorten the interval from 6 months to 5 months for when people who have received the Pfizer-BioNTech COVID-19 vaccine can get a booster dose.  Only people who received two doses of Pfizer-BioNTech vaccine during their primary series can now receive an mRNA (Pfizer-BioNTech or Moderna) booster dose 5 months after their second shot. The booster interval remains the same for those who received the Moderna vaccine (6 months) or the Johnson & Johnson (J&J) vaccine for their primary series.  Additionally, CDC is recommending that moderately or severely immunocompromised children aged 5-11 years receive a third dose of vaccine 28 days after their second dose.  At this time, only Pfizer-BioNTech is authorized for children.  Parents should talk with their pediatrician or health care provider about a potential third dose. On Monday, the Food and Drug Administration also authorized booster doses for those aged 12-15 years and the CDC will discuss adoption of change this later this week.  To find vaccination locations near you, go to vaccines.gov or call 1-800-232-0233.