Moderna doubles size of Covid-19 vaccine pediatric study

Moderna Inc

is planning to double the size of an ongoing trial testing its

Covid-19

vaccines in children aged six months to less than 12 years.

According to updated details on clinical trial record site clinicaltrials.gov, the study will now enroll an estimated 13,275 participants, nearly double the earlier target of 6,975 participants.

In July, Moderna said it was in discussions with the US food & drug administration to expand the study with an objective to enroll a larger safety database, which increases the likelihood of detecting rarer events.

The company's vaccine, which received its emergency authorization for people aged 18 and older in the United States in December, is currently under an FDA review for use in adolescents.

Rival shot from Pfizer Inc and its German partner

BioNTech

was authorized for ages 12 to 15 years earlier this year.