More information is available about how well the vaccine works.

As a result, the company reported little data on how the vaccine might work among those people.

The vaccine may not work as well during this time.

You can't make vaccines work when they're already deep in the disease.

If your child is using any of these drugs, this vaccine may not work as well.

It's not certain, of course, that the new vaccine will work.

But he said the vaccine would probably still work if given in the first 48 hours after a person was exposed.

And the first vaccines may not work for a high percentage of the population.

If the vaccine works, the body can then fight off a serious infection.

But the vaccine works only in animals and may never be practical for people.