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. from US News Headlines, Latest USA News, US news live on Times of India https://ift.tt/3fVENFk