According to the White House Central Files manual, this category was used "for material pertaining to consultative assistance for the prevention and control of disease, hospital operation, conducting research in biology and medicine, blood donations, enforcing interstate quarantine regulations and conducting medical and hospital care programs; pollution and controls."
Specific exceptions are: blood donations by government employees (see PE); grants-in-aid (see FA); health of federal civil service employees (see PE); health of servicemen (see ND); health of veterans (see VA); Indian health activities (see IN).
