The US State dept has great resources for the US traveler
https://travel.state.gov/content/travel/en/traveladvisories/traveladvisories.html.html?_gl=1*1ha5nld*_gcl_au*NTY4MTkxODM3LjE3MTE3NDc3NTc.
drop down to the "learn about your destination " box and enter the countries to be visited. It will let you know about required visas, embassies, health issues and much more.