Parents may be able to vaccinate their youngest kids as early as June 21, officials say. Here's what to know.

Parents eager to vaccinate their youngest children may be able to do so as early as June 21, a top White House pandemic advisor said during a briefing Thursday. 

Dr. Ashish Jha, coordinator of the federal COVID-19 response, told reporters the Biden administration is working closely with states, pharmacies and other health care providers to prepare for authorization from key regulatory agencies.