What you need to know about the coronavirus vaccine for kids ages 5 to 11

“One dose is better than no dose,” said Chulie Ulloa, a pediatric infectious-disease specialist [and assistant professor] at the University of California, Irvine. “I anticipate children, even after one dose, will have a pretty strong protection, but you will need that second dose to get you closer to 100 percent,” she said. “Also taking into consideration different individuals, children who are immunocompromised or who have underlying conditions that may reduce their response to the first dose — in general, starting the series sooner rather than later is best, especially going into the holiday season.”