Zika fever (also known as Zika virus disease) is an illness caused by the Zika virus.[64] Most cases have no symptoms, but when present they are usually mild and can resemble dengue fever.[64][65] Symptoms may include fever, red eyes, joint pain, headache, and a maculopapular rash.[64][66][67] Symptoms generally last less than seven days.[66] It has not caused any reported deaths during the initial infection.[65] Infection during pregnancy causes microcephaly and other brain malformations in some babies.[6][7] Infection in adults has been linked to Guillain–Barré syndrome (GBS).[65] from wiki