![In-game picture of Madagascar][1]

The country of Madagascar is only reachable through sea. This means that if the country closes its shipyard before I reach it there is no way I can possibly win… or is there?

How can I work around this? 

http://www.crazymonkeygames.com/Pandemic-2.html
  [1]: https://i.sstatic.net/0hCCA.png