By BY APOORVA MANDAVILLI Health https://ift.tt/3agxZiq Myocarditis, a rare side effect, occurs mostly after the second dose. So in some countries, officials are trying out single doses for children. New York Times your-feed-science, Coronavirus Risks and Safety Concerns, Disease Rates, Vaccination and Immunization, Coronavirus (2019-nCoV), Children and Childhood, Heart, Teenagers and Adolescence October 6, 2021 at 11:22PM