What are the symptoms of Yellow Fever?
It usually takes anywhere from 3 to 6 days after being bitten by the mosquito for symptoms to develop, if they develop at all. In milder cases, the person has no symptoms, but in more serious cases, the patient will develop typical flu-like symptoms associated with many other illnesses. If the patient doesn’t improve within three to four days of the onset of the symptoms, they may begin to go through a “toxic phase” where fever redevelops, jaundice appears, external and internal bleeding occurs, and kidneys may begin to fail. Patients can also develop delirium, seizures, heart problems, and or lapse into a coma. Mortality rate is about 50% once patients have reached this point. Those that recover do not seem to have any debilitating consequences of the disease.
