Re: vaccines for peru and ecuador
The CDC's recommendations are available at:
I think both pages contain approximately the same information.
Basically, you need your regular vaccines, and you might need typhoid, yellow fever, hep A, Hep B, or rabies, depending on exactly where you are going, what you are doing, and how long you'll be there.
Talk to your GP or a travel medicine doctor a couple of months in advance, to give the vaccines time to start working.