Traces of Polio Found in Kolkata Sewer, Officials Say No Cause For Alarm Yet - The Wire

‘It is not unusual to find a vaccine virus. We have heightened surveillance,’ health department officials said.

Kolkata: Traces of the polio virus was found in sewage water of Kolkata’s Metiabruz in late May but have been found to be inactive, reports have said. While India was declared polio free eight years… [+2030 chars]

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