She saw the social causes of disease every day.

Tuberculosis did not exist independently of housing.

Alcohol abuse did not exist independently of traders and reservation economics.

Infectious disease did not exist independently of sanitation.

Mental strain did not exist independently of land loss and family instability.

Susan became increasingly interested in prevention.

She promoted hygiene.

She argued against shared drinking cups, which could transmit disease.

She encouraged better ventilation and cleanliness.

She supported public-health campaigns.