The World Health Organization and its partners will test the public health effect of immunization in parts of Malawi, Ghana, and Kenya.

The World Health Organization reports that a number of countries are experiencing “sizeable” numbers of the infection due to a failure to vaccinate.

Scientists debate why the number of whooping cough cases is up, and whether the effectiveness of a vaccine introduced within the last two decades is to blame.

The WHO reports more than 41,000 cases in the region in the first half of 2018.

Changsheng is found to have forged records for a rabies vaccine and is accused of distributing thousands of substandard DPT immunizations to be used in children.

The increase is associated with travel to Europe, where large outbreaks are occurring.

Infants whose moms received the shots when they were pregnant were no more at risk of dying or being hospitalized than other babies. 

The increase is attributed to a drop in immunization rates.

The drug may worsen future infections for people who haven't already been exposed to the virus.