No, malaria and yellow fever are not the same illness, though they are spread in a similar way. Malaria is caused by a parasite that gets inside your bloodstream and causes illness. This disease can be fatal if medical attention is not sought fast enough.
Yellow Fever is a virus, also spread by mosquitos, which is of typically short duration. Symptoms usually include fever, chills, loss of appetite, nausea, muscle pains and headaches. They usually improve within five days.