Even better would be an oral vaccine, also being developed.

The oral vaccine, which the Army helped develop, costs $1.90 and is effective for five years.

With an oral vaccine, there is no risk of blood contamination.

The doctors could have used a more expensive oral vaccine with fewer side effects.

The oral vaccine is given in four capsules taken every other day, doctors said.

The last government said an oral vaccine for badgers would be available by 2015.

Avoid contact with people who have recently received oral polio vaccine.

The first live oral polio vaccine tested on a large population.

A number of safe and effective oral vaccines for cholera are available.

Neither you nor anyone in your household should take the oral polio vaccine.