The FDA recommends vaccination before adolescence and potential sexual activity.

Peru does not require any immunizations for entry, although it recommends vaccination against Yellow Fever.

Previously, the CDC had said doctors are free to use the vaccine in boys but had stopped short of recommending routine vaccination.

This excludes the large majority of individuals aged six months to 24 years, a group for which the CDC recommends vaccination.

Therefore, it is standard medical practice to recommend vaccination.

There also can be severe side effects to the smallpox vaccine, which is another reason we do not recommend vaccination.

The Centers also recommends vaccination for "high-risk adolescents," those who have had two or more sexual partners in the last six months.

I would recommend vaccination immediately, along with immunization shots for hepatitis A and B. Don't want to lose you prematurely.

Since the dangers of the disease are well known, while the dangers of the vaccine are quite minimal, most doctors recommend vaccination.

But the Centers for Disease Control recommends yellow-fever vaccination for all travelers going outside urban areas of Kenya.