Dengue. Dengue. Chapter 5 - Dengue Fever (DF) and Dengue Hemorrhagic Fever (DHF) - 2010 Yellow Book. About 75% of all DENV infections are asymptomatic.
Symptomatic infection (dengue) most commonly presents as a mild to moderate, nonspecific, acute, febrile illness. However, as many as 5% of all dengue patients develop severe, life-threatening disease. Early clinical findings are nonspecific but require a high index of suspicion, because recognizing early signs of shock and promptly initiating intensive supportive therapy can reduce risk of death among patients with severe dengue from 10% to <1%. See Box 3-01 for information regarding the new World Health Organization (WHO) guidelines for classifying dengue.
Dengue begins abruptly after an incubation period of 4–7 days (range, 3–14 days), and the course follows 3 phases: febrile, critical, and convalescent. Global health, local information. Marker Color Marker color reflects the noteworthiness of events at a particular location during a given time window.
An event's degree of noteworthiness is based on the significance rating of the alert provided by HealthMap users. In the absence of user ratings, the system assigns a composite score based on the disease importance and the news volume associated with the alert. If a location's marker has multiple alerts, the color associated with the most prominent alert is used. Marker Size.