Summary: Pfizer asked the Food and Drug Administration Tuesday to authorize two low-dose shots for children between six months and 5 years old. Dr. Yvonne Maldonado, a professor of pediatric infectious disease at Stanford University who has helped conduct trials for the under-5 vaccine, joins Judy Woodruff to discuss. PBS NewsHour is supported by - https://www.pbs.org/newshour/about/funders
