Acid-fast and seals.
D002170:Canada; D005060:Europe; D005381:Financing, Organized / Q000266:history*; D049673:History, 20th Century; D006801:Humans; D010678:Philately; D014376:Tuberculosis / Q000266:history*; D014481:United States; D014837:Voluntary Health Agencies / Q000266:history*