A Chipotle store in Massachusetts was temporarily closed due to concerns that several employees may have contracted the norovirus.The company said Tuesday that four workers reported not feeling well, spurring Chipotle to shut the doors at its restaurant in Billerica — a town about 20 miles outside of Boston, where health officials suspected Chipotle customers of contracting norovirus in December last year.The store was closed for a “full sanitation,” Chipotle ...