infection - the pathological state resulting from the invasion of the body by pathogenic microorganisms

haemorrhagic fever, hemorrhagic fever, VHF, viral haemorrhagic fever, viral hemorrhagic fever - a group of illnesses caused by a viral infection (usually restricted to a specific geographic area); fever and gastrointestinal symptoms are followed by capillary hemorrhage

herpangia - a viral infection (usually in children) marked by sore throat and fever and papules in the mouth and throat and headache and abdominal pain; usually subsides in a short time

HIV - infection by the human immunideficiency virus

viral pneumonia - pneumonia caused by a virus