Malaria: Risk exists in some parts of Mexico and central America
Yellow fever: A vaccination certificate may be required for entry to some of these countries if you are coming from tropical South America or sub-Saharan Africa. However, it is only recommended for travellers to Panama going outside major cities.
Hepatitis B: This may be recommended if you are staying longer than six months, and for children.
Typhoid: Recommended for developing countries in this region.