(Reuters) -Pediatric infectious disease expert Dr. Lakshmi Panagiotakopoulos resigned on Tuesday as co-leader of a U.S. CDC working group that advises outside experts on COVID-19 vaccines and is leaving the agency, two sources familiar with the move told Reuters.

Pediatric infectious disease expert Dr. Lakshmi Panagiotakopoulos of the U.S. CDC resigned on Tuesday as co-leader of a working group that advises outside experts on COVID-19 vaccines and is leaving the agency,

The move was a departure from the process in which ACIP experts meet and vote on changes to the immunisation schedule or recommendations on who should get vaccines before the agency's director made a final call.