The US CIA director John Brennan has directed the agency to cease "operational" use of vaccine programmes worlwide.

The CIA's move comes after a wave of deadly attacks by militants on polio vaccination workers in Pakistan. And more than 60 polio workers and security personnel were killed between December 2012 and April 2014, most of them in the Khyber Pakhtunkhwa province, according to Pakistani officials and humanitarian workers.

The agency will also not seek to obtain or exploit DNA or other genetic material acquired through such pretext programmes. CIA indicated that this new policy applies worldwide to US and non-US persons alike.

Genetic material obtained through a FAKE door-to-door hepatitis B vaccination programme helped the CIA confirm Bin Laden's whereabouts in the Pakistani city of Abbottabad.

Ref - http://www.bbc.com/news/world-us-canada-27489045

Zero Dark Thirty is a good movie to watch on the same. but did they succeed in identifying OBL in the same movie?

Quite an intense flick. Saddest part for me being how the informant used his credibility to enter the compound and took away top CIA operatives in that suicide attack. In the movie, the vaccination guys are chased away by other members of Osama's household. It seems that part of the Navy SEAL account was rehashed for audience

In the U.S mzungu purposely infected blankets with smallpox and handed out them to native Americans killing most of them.