KOLKATA, 14 FEB: Alarmed at the detection of a fresh polio case in the state in the midst of intensified campaign against the diseases the state government has been compelled to conduct a polio immunisation drive in selected five districts, including Kolkata.

Officials said the polio immunisation drive has been ordered after an 18-month-old child Rupsana Khatun of Panchla in Howrah was found to