The 'Phase 3' portion of the trial began last week. That's where researchers work to determine whether a vaccine is capable of fighting off the intended disease.
The so-called "anti-vaccination" movement is causing a destructive rise in the frequency of certain diseases, like measles, that the U.S. had all but eradicated.
Faxton St. Luke's Healthcare is encouraging all soon-to-be-mommies to get a tetanus, diphtheria and pertussis vaccine to keep infants from becoming sick.