travel-related infectious disease control strategy travel recommendation control strategy A travel-related infectious disease control strategy that has an action specification that is realized by making recommendations to travelers to either (1) avoid travel to an ecosystem with an ongoing infection such as an epidemic, (2) take precautions when traveling to such an ecosystem, (3) receive certain vaccinations prior to traveling to such an ecosystem, or (4) take certain medications when traveling to such an ecosystem A travel-related infectious disease control strategy that recommends to travelers to either (1) avoid travel to a region with an ongoing infection such as an epidemic, (2) take precautions when traveling to such a region, (3) receive certain vaccinations prior to traveling to such a region, or (4) take certain medications when traveling to such a region William R. Hogan travel recommendation infectious disease control strategy