[_Jim]

there wasn't as much travel between countries and continents as there is today.

... we *still* got Cholera freom across 'the big pond' in 1932 ...

As to travel - what was the total figure for emigration *into* the United States (and many of these emmigrants brought with them al manner of contagion) over the course of our history?

[Black Agnes]

In the waves of immigration before 1924 we actually screened for sick people. Sick? No entry!