Infectious diseases department is a department that treats infectious diseases. Common infectious diseases include bacillary dysentery, typhoid fever, cholera, viral hepatitis A, meningitis, scarlet fever, whooping cough, influenza, measles, filariasis, Japanese encephalitis and schistosomiasis.
Infectious diseases are characterized by pathogenicity, infectivity and epidemic, and often have immunity after infection. Some infectious diseases are seasonal or endemic. The classification of infectious diseases has not been unified. Some people classify by pathogen, others by transmission route.