The vaccine makes some people sick, so doctors save it for those at highest risk of disease.

Such a vaccine would make it possible to differentiate between infected and vaccinated animals.

But a 30 percent effective vaccine "doesn't make sense" when the money could be spent more directly on education and other preventions.

But in patients with less aggressive tumors, the vaccine made a statistically significant difference.

Political and religious leaders there claimed that the vaccine made girls infertile.

While vaccines have made some childhood illnesses rare, many others remain a fact of life.

The vaccine can make people feel sick, and the restrictions on those who've just been vaccinated are daunting.

Nonetheless, the vaccine has made it to some unusual quarters.

He was negative, but the vaccine would make him test positive.

Talk to your gynecologist to determine if the vaccine makes sense for you.