Mason Sigwart was born as the world around him was shutting down. His mother, Amanda Sigwart, was rolled into an operating room at Virtua Voorhees Hospital in the US state of New Jersey on March 23, 2020, days after a novel coronavirus had begun to shut down businesses. Sigwart felt some tension in the air and avoided listening to local news, but the nurses smiled and told Sigwart everything would be OK. By the next day, nurses were in face masks and full-body gowns, creating a somber backdrop for a joyful occasion. The months — years — that followed for the Sigwarts and other families that ha…