I had planned a trip to Panama over a month ago. But had the warning a Yellow Fever Vaccination was required for entry. And on return from Panama Nicaragua also required the same after returning. But the Vaccinations here were only available to Citizens and permanent residents. I searched further and could get the vaccination from a private doctor for $140, but no official government proof as required. So, I went to Costa Rica instead. At the Nicaragua border four people who had been to Panama were removed from the bus. Seems a mountain out of a molehill as something like 38 cases of it reported in the Americas and mostly in Brazil. Oh and Costa Rica in between has no such requirement, and the vaccine available but will take a few days and you have to wait 10 days for it to take effect and travel. Another case of border wars with travelers as the casualties. I add if flying I have found none of these things apply. Just that I don't want to fly to El Salvador from San Jose instead of going straight on to Panama or overflying Nicaragua on the way back. I swear these rules are harder than those for playing cricket.