A team of French researchers warns that the Zika virus, which is linked to brain damage in new-born babies, may also cause a serious brain infection in adults. In an article published in ‘New England Journal of Medicine’, the scientists said they found Zika infection in the spinal fluid of an 81-year-old man in January. The patient also suffered from an inflammation of the brain which caused high fever and partial paralysis. The researchers say there is feared to be a link between the Zika infection and brain damage in the victim. Zika infection in adults often causes mild symptoms, with a low fever, headaches and joint pain.