Chennai, Oct 12 (PTI) Tamil Nadu has remained polio free for 21 consecutive years, state Health Minister Ma Subramanian said on Sunday.

After launching a polio camp in neighbouring Chengalpattu, one of the six districts for polio camps, he said a target has been set to vaccinate 7.88 lakh infants in these districts.

The India Experts Advisory Group has identified 269 districts in 21 States as vulnerable for polio diseases in view of the spread of virus in neighbouring countries, he said.

Speaking to reporters on Sunday, he said six districts from Tamil Nadu -- Chengalpattu, Mayiladuthurai, Sivagangai, Thanjavur, Tirunelveli and Virudhunagar were selected among the 269 districts for the conduct of the polio camp under the Sub-National Immunisation Day round for polio vaccination as sugge

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