In the 1800s, death was largely caused by infectious diseases, with tuberculosis, cholera, typhoid, and child‑borne illnesses leading the list.
Dominant infectious killers
Tuberculosis, often called the "white plague", was the single greatest adult killer. It spread in cramped, poorly ventilated tenements and caused slow wasting and coughing fits.
Cholera, a waterborne disease, caused rapid dehydration and death. Outbreaks swept through cities with inadequate sewage systems.
Typhoid fever, also waterborne, and typhus, spread by lice in overcrowded conditions, added to the epidemic burden.
Childhood and infant deaths
Children under five faced a high risk of death from diphtheria, scarlet fever, and smallpox. Vaccination was not yet widespread, so outbreaks were deadly.
Infant diarrhea, often called the "summer complaint", killed many newborns through dehydration caused by contaminated food and water.
Industrial and occupational hazards
Factories, mines, and mills operated with little safety. Heavy machinery caused injuries that frequently led to fatal infections or gangrene.
Mines exposed workers to toxic gases and cave‑ins, while urban laborers inhaled coal smoke, weakening their lungs and making them more susceptible to pneumonia and tuberculosis.
Public health reforms
John Snow’s 1854 investigation linked cholera to a single water pump, proving the role of contaminated water. This led to the construction of London’s sewer system and the Public Health Act of 1848.
Acceptance of germ theory and antiseptic surgery in the late 19th century began to reduce the impact of these diseases.
Legacy of 19th‑century mortality
The high death rates of the 1800s shaped modern public health. Improved sanitation, clean water, and vaccination have since lowered the incidence of the diseases that once dominated mortality.