The difference between colds and hemorrhagic fever: 1, from the causative microorganisms, colds are generally caused by viral infections, or bacterial infections caused by, let’s say, Haemophilus influenzae this kind of; while the hemorrhagic fever is caused by leptospirosis, it is a completely different organisms. 2, from the course of the disease, colds are relatively acute, hemorrhagic fever to be relatively slow. 3, from the symptomatic point of view, colds are mainly with a runny nose, cough, In addition to fever, hemorrhagic fever also causes bleeding from the skin, digestive tract, and mucous membranes of the mouth. Sometimes hemorrhagic fever can lead to organ failure, which can lead to oliguria, anuria, and even serious complications; whereas colds have a better prognosis and do not have any special complications.