From Level 4: Virus Hunters of the CDC, pg. 38, by J.B. McCormick, M.D., S. Fisher-Hoch, M.D., and L.A. Horvitz. Here McCormick relates a story from a trip to Sierra Leone in March, 1976, as part of an effort to deal with the Lassa Fever virus.
It’s nice to think of Americans showing up some place and dispelling old fears about us, and of us taking the long-view of a problem (in this case: don’t wait for a pathogen to arrive in America before trying to understand it and provide a treatment or cure) to the benefit of everyone. No charge. That’s my kind of America.