--subdivision Reporting under individual diseases and types of diseases, e.g. Tuberculosis--Reporting; and subdivision Toxicology--Reporting under individual chemicals and groups of chemicals, e.g. Copper--Toxicology--Reporting
--subdivision Health and hygiene under ethnic groups and classes of persons; and subdivision Health aspects under topics and individual wars, e.g. Recreation areas--Health aspects; World War, 1939-1945--Health aspects
