Most people who contracted the disease were unvaccinated and some state legislatures are now considering whether to curtail nonmedical vaccine exemptions.

The outbreak has infected 50,000 people and killed 300, most of them children, since cases began to crop up in October 2018.

Most of the 34 patients are under 10 years old, and almost all have been confirmed as unvaccinated against the virus.

The number of cases in Democratic Republic of Congo’s latest outbreak of the virus has now surpassed 100.  

A step-by-step study of diseases that jump species gives subtle clues about future epidemics.

A total of 27 people have died since April, but new funds and the deployment of an experimental vaccine are expected to help contain the virus.

The position was eliminated the same week a new Ebola outbreak was declared in the Democratic Republic of the Congo.

The vaccine shows better-than-expected effectiveness against the most common and most virulent strain of influenza in children under 9 years old.

More than 100,000 cases of the bacterial disease have been reported in the war torn country.