As many as 57 students were tested positive for coronavirus from a single hostel in a school in the Karnal district of Haryana. The development comes after the state government reopened schools after a perennial shutdown due to the pandemic. br br Following the mass Covid-19 infection, classes and other academic activities have been suspended. The school buildings and hostels have been declared as a containment zone, Karnal Deputy Commissioner Nishant Kumar Yadav said.