Our safety depends upon official vigilance. Here the Angel of Cleanliness bars the gate to cholera, yellow fever and smallpox with Quarantine. Harpers Weekly 1885, National Library of Medicine
	Cleanliness was next to godliness, when it came to disease prevention. Here the Angel of Cleanliness bars the gate to cholera, yellow fever and smallpox with Quarantine. Sanitation and quarantine were still the first line of defense against the epidemic diseases, whose causes were vigorously debated.