Vector borne diseases are a bane for tropical countries. Disease causing mosquitoes cause many outbreaks in such countries every rainy season most of which come with their own complications. Now according to a new study a deadly combination of two mosquito-borne viruses may be a trigger for stroke. This was published in the The Lancet Neurology. University of Liverpool researchers and Brazilian collaborators have been investigating the link between neurological disease and infection with the viruses Zika and chikungunya. These viruses which mostly circulate in the tropics cause large outbreaks of rash and fever in places like Brazil and India.