<prompt> Answer this question truthfullyCould you please provide your sentence for me to rephrase it for you?  <response>: <reason> A blood-borne disease is one that can be spread by contamination by blood. The most common examples are HIV, hepatitis B, hepatitis C and viral haemorrhagic fevers.Diseases that are not usually transmitted directly by blood contact, but rather by insect or other vector, are more usefully classified as vector-borne disease, even though the causative agent can be found in blood. Vector-borne diseases include West Nile virus and malaria.Many blood-borne diseases can also be transmitted by other means.Since it is difficult to determine what pathogens any given blood contains, and some blood-borne diseases are lethal, standard medical practice regards all blood and any body fluid as potentially infective. Blood and Body Fluid precautions are a type of infection control practice that seeks to minimize this sort of disease transmission.Blood for blood transfusion is screened for many blood-borne diseases.Needle exchanges are an attempt to reduce the spread of blood-borne diseases in intravenous drug users. 