How will new CDC mask changes impact the risk for children under the age of 12? Tags: READ: Children under 12 aren’t eligible to get vaccinated and likely won’t be able to receive the shot for several months. That means families are facing a lot of difficult decisions about what’s safe and what isn’t. “I was really excited. I got my news update on my phone and I screamed and came down here and said, ‘Oh my gosh, the FDA approved it,’” recalled 13-year-old Megan Sims. Sims was among the first of the Metro Detroit teenagers to get the Pfizer vaccine, but her 10-year-old sister isn’t eligible yet. Their father, Dr. Matthew Sims, is Beaumont Health System’s director of infectious disease research.