An old vaccine against plague exists, but it has many side effects.

There is much active investigation into the development of a new vaccine, but at present no vaccine exists.

One reason is that not enough vaccine exists.

A quadrivalent vaccine now exists, which combines all four vaccines.

It is the only sexually transmitted disease for which a vaccine exists.

While vaccines exist, the report said there is need for improvement.

A vaccine exists, and a better one is expected by next year.

Despite a need, no effective vaccine currently exists, although efforts to develop one are ongoing.

By 1947, both a vaccine and a treatment already existed for tuberculosis.

A vaccine exists, but it is in short supply.