Pakistan

In January, health officials began an aggressive vaccination campaign to counter the spreading disease.

So far this year, 200 Pakistanis have been diagnosed with polio, the most in more than a decade.

Just three days after five people involved in the polio vaccine effort in Pakistan were shot by unidentified assailants, three more are killed.

Five workers at anti-polio campaigns were shot at close range this week, creating a major setback for efforts to prevent the crippling disease.

Two employees of the World Health Organization were shot last week while working on a vaccination campaign in Pakistan.

Officials in Punjab province have arrested the owners of pharmaceutical companies making cardiac drugs suspected to contain heavy-metal contaminants.