Pfizer signs up children ages 12 to 15 for vaccine testing

Pfizer Inc said on Friday it had finished enrolling children aged 12 to 15 in a study testing its COVID-19 vaccine, as the U.S. drugmaker seeks to expand the shot’s use.

The study, which was announced in October, had enrolled over 2,000 participants, a Pfizer spokeswoman said in an emailed statement.

Last month, Moderna Inc. also began a study to test its vaccine, which uses a similar technology to the Pfizer vaccine, in adolescents aged 12 to 17.

Vaccines from Pfizer and Moderna, which are being rolled out in the United States, are not yet available for use in children due to a lack of study data. The minimum age is 16 for Pfizer’s, 18 for Moderna’s.