Although the yellow fever vaccine is one of the most successful ever developed, epidemics continue to occur.

I take the formula for the fever vaccine with me.

The yellow fever vaccine is recommended for all travelers over 9 months of age.

You weren't shot with anything more serious than yellow fever vaccine, the burningest shot I know.

Yellow fever vaccine is effective for 10 years, so travelers should check their shot records to be sure they are updated as needed.

A yellow fever vaccine is required for entry into the country.

Yellow fever vaccine is for use in adults and children who are at least 9 months old.

The yellow fever vaccine is used to help prevent this disease in adults and children who are at least 9 months old.

Like any vaccine, the yellow fever vaccine may not provide protection from disease in every person.

I ought to be on the road, bringing the fever vaccine to other camps.