It is therefore more like hemorrhagic fever, and the symptoms in the majority of people are gone in 7–10 days. However, according to reports from Central and South America, some people have experienced complications that are neurological in nature, including neurological inflammatory disorders and Guillain-Barré syndrome, which cause patients to have limb weakness.
Others have developed encephalitis, although the percentage of such patients is low. The complication we are most concerned about now, however, is mother-to-child transmission. Since the virus resides in the blood, it has the potential to affect fetal development when it permeates through the blood vessels and placenta.