Two residents of Munger districtin Bihar tested positive for Covid-19 on Thursday, taking the total number of confirmed cases in the state to six, an official said.According to Pradip Das, the director of Rajendra Medical Research Institute here, samples were collected of 55 people who had come in contact with a 38-year-old who got infected with the virus and died last Saturday, a day before his test results arrived.Of them, two tested positive, he added.