Yellow Fever

  • Medical Author:
    Steven Doerr, MD

    Steven Doerr, MD, is a U.S. board-certified Emergency Medicine Physician. Dr. Doerr received his undergraduate degree in Spanish from the University of Colorado at Boulder. He graduated with his Medical Degree from the University Of Colorado Health Sciences Center in Denver, Colorado in 1998 and completed his residency training in Emergency Medicine from Denver Health Medical Center in Denver, Colorado in 2002, where he also served as Chief Resident.

  • Medical Editor: Jerry R. Balentine, DO, FACEP
    Jerry R. Balentine, DO, FACEP

    Jerry R. Balentine, DO, FACEP

    Dr. Balentine received his undergraduate degree from McDaniel College in Westminster, Maryland. He attended medical school at the Philadelphia College of Osteopathic Medicine graduating in1983. He completed his internship at St. Joseph's Hospital in Philadelphia and his Emergency Medicine residency at Lincoln Medical and Mental Health Center in the Bronx, where he served as chief resident.

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What is the incubation period for yellow fever?

The period of time from contracting the infection to the development of symptoms (incubation period) is generally between three to six days.

Is yellow fever contagious? How long is the contagious period for yellow fever?

Yellow fever is transmitted to humans by the bite of infected mosquitoes. Yellow fever is not contracted by direct contact with other individuals who are infected. Humans with yellow fever are infectious and can transmit the virus to uninfected mosquitoes shortly before the onset of fever and for three to five days after the onset of symptoms.

What are yellow fever symptoms and signs?

After infection with the yellow fever virus, many individuals will experience no clinically apparent manifestations of the disease (asymptomatic), while others will go on to develop a mild, self-limiting flu-like illness characterized by the following symptoms and signs:

Most patients with this initial acute phase of the disease improve after approximately three to four days. However, 15% of patients may enter a second phase of the disease which typically appears after a short remission of symptoms (about 24 hours) from the initial phase of the illness. This toxic phase of the disease is more severe, at which time the high fever returns and more organ systems become involved. In addition to the above symptoms, the following symptoms and signs may also develop:

Medically Reviewed by a Doctor on 6/15/2015

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