I came across José Amador’s book Medicine and Nation Building in the Americas, 1890-1940 (Vanderbilt University Press, 2015).  Nice chapter on Bailey Ashford’s hookworm eradication campaign in Puerto Rico.  Amador nicely draws out the public health circuits and networks that enabled these campaigns to succeed.  And he does not neglect the racism (literally: back then everyone was thinking “race this, race that”) that pervaded government policy across the Americas and within the elites of the various countries he considers.