Photo credit: AP Photo/Chris O’Meara Troubled fast food chain Chipotle is back in the news after an employee at a location in Billerica, Massachusetts, was diagnosed with the highly contagious norovirus earlier this week. Related Links Chipotle to start push to win back customers in February According to Boston’s WHDH news, one employee was confirmed as having the virus by the city’s health department. Two other employees also displayed symptoms. The health department said that the restaurant, which is located about 25 miles outside of Boston, voluntarily shut down on Tuesday to undergo cleaning and at this point, no customers have reported feeling ill. The restaurant is expected to reopen. Over