According to sources in R G Kar Hospital, several students had fever, abdominal pain and vomiting, while some reportedly experienced panic attacks. (File photo)Six girls from a government school in north Kolkata have tested positive for influenza after 31 hostel students were taken ill with symptoms including respiratory distress, nausea and abdominal pain. Nine others remain admitted at RG Kar medical College and Hospital, while 16 students have been discharged. Twenty-four girls were taken to RG Kar between 6 pm and 8 pm, after complaining of similar symptoms. He said that the six samples tested so far had returned positive for influenza.