Yellow fever presents as a serious and potentially fatal viral illness. Carried mainly through the bite of infected mosquitoes, this ailment affects human beings globally, particularly in tropical and subtropical areas. Signs vary widely from mild to severe, encompassing fever, headache, muscle aches, nausea, vomiting, and jaundice. In serious case

Pneumonia is a/happens to be/presents as an infection that inflames the air sacs in one or both lungs. These air sacs may fill with fluid or pus (purulent material), causing cough with phlegm or pus, fever, chills, breathing problems, and aches in your chest. Pneumonia can be caused by a variety of organisms, including bacteria, viruses, and fungi.