WORCESTER – City officials said they only learned of the coronavirus outbreak this week at the Walmart Supercenter on Tobias Boland Way through social media postings.The city ordered the store to close after city officials heard of problems at the store that led to 23 employees testing positive for COVID-19.The city’s medical director, Dr. Michael P. Hirsh, said the state data system that is used to track COVID-19-positive cases did not initially pick up the outbreak at […]