The virus responsible for causing polio has been discovered in the Gaza Strip, according to the World Health Organization (WHO). The virus was found in six areas at the end of June, WHO spokesman Christian Lindmeier said on Friday. “It is important to emphasize that the virus has only been isolated from the environment.” No associated infections are known at this time, and no associated cases of paralysis been recorded. WHO is working with local authorities to carry out a risk assessment. One possible response would be an immediate vaccination campaign, the organization said. In view of the de…