JD4691 - A conceptual illustration of the Zika virus, a mosquito-bourne flavivirus closely related to the dengue virus. Transmission primarily occurs via bites from the Aedes aegypti mosquito, found in tropical and subtropical regions throughout the world. Patients may experience symptoms such as fever, rashes, joint pains, and conjunctivitis. However, infants have been reported to suffer from congenital microcephaly if their mothers were infected with the virus while pregnant. Microcephaly is a neurodevelopmental disorder caused by reduced head size and growth, impairing normal brain function.