Yellow fever in human is generally caused by female mosquitoes, the bite of these mosquitoes can spread the infection in the body which leads to pain in the patient. He also suffers from severe fever and fatigue conditions. This condition of health disorder makes the person inactive in certain states and any kind of this disease must be treated with specific care since serious cases can lead to worsen conditions of the patients and even death can happen. Suitable vaccines must be given to resist against this disease. This condition of illness leads to damage of liver in the human body and general loss of appetite is common with the person who is infected with this disorder.