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Sewage samples taken from Viracopos International Airport in Campinas, Brazil tested positive for the polio virus. Campinas is currently serving as camp for the Nigerian and Portuguese soccer teams throughout the 2014 FIFA World Cup in Brazil. 

The samples were taken back in March, however the results have appeared just now. 

According to the World Health Organization, no human cases have been reported yet.  

"This detection does not mean any change in the epidemiological situation of Brazil or a threat to the elimination of the disease," the Brazilian Health Ministry said in a statement.

WHO stated that the samples were only found in the sewage and were yet to spread elsewhere. 

"Polio is highly contagious and is commonly spread through sneezing, coughing and fecal matter. It attacks the nervous system and can rapidly cause paralysis Making matters worse, sometimes the virus doesn't show any symptoms, and that can only promote the spread of the virus," Bustle reported. 

Reportedly 95 percent of children in Brazil have been vaccinated and the country has been free from polio since 1989. 

With the lack of confirmed polio cases found in humans, soccer fans should not be all that worried about traveling to Brazil for the World Cup, reported D&T.