Two German infection experts Professor Martin Eichner from the University of Tubingen and Dr. Stefan Brockmann from the Department of Infection Control in Reutlingen have warned that Syrian refugees might spread polio in Europe.

The refugees have been settling in other countries and their unhygienic behaviour is best suited for the transmission of the disease.

In general, the inactivated polio vaccine (IPC) is provided for the protection of polio. But, it is very important to know the vaccine is not able to provide complete protection against the infection.

As per experts, polio infections do not immediately exhibit symptoms. There can be a case, where the virus can be present in the body for around a year before it gets detected.

But by that time, many others have already got infected from the virus. "Vaccinating only Syrian refugees has been recommended by the European Centre for Disease Prevention and Control - must be judged as insufficient; more comprehensive measures should be taken into consideration", affirmed both the experts.

On the other hand, the World Health Organisation (WHO) has confirmed polio outbreak has taken place in Syria with 10 cases has been confirmed.