By Manas Mishra and Michael Erman (Reuters) -Advisers to the U.S. Food and Drug Administration on Tuesday unanimously recommended that the agency authorize Moderna Inc’s COVID-19 vaccine for children and teens aged 6 to 17 years of age. Around 77 million people in the United States have received at least a two-dose course of Moderna’s vaccine, which has long been available for people aged 18 and older. The committee of outside experts is scheduled on Wednesday to consider the Moderna shot for children under 6, and Pfizer and BioNTech’s COVID vaccine for children under 5 – and in both cases as …