Port health services through the ages.
D049668:History, 15th Century; D049669:History, 16th Century; D049670:History, 17th Century; D049671:History, 18th Century; D049672:History, 19th Century; D049691:History, Medieval; D009326:Naval Medicine; D011635:Public Health Administration; D011790:Quarantine / Q000266:history*; D014944:World Health Organization