Officials say drug caused Nigeria polio

not good news...

LONDON - A polio outbreak in Nigeria was caused by the vaccine designed to stop it, international health officials say, leaving at least 69 children paralyzed.

It is a frightening paradox in a part of the world that already distrusts western vaccines, making it even tougher to stamp out age-old diseases.

The outbreak was caused by the live polio virus that is used in vaccines given orally — the preferred method in developing countries because it is cheaper and doesn't require medical training to dispense.

"This vaccine is the most effective tool we have against the virus, but it's like fighting fire with fire," said Olen Kew, a virologist at the U.S. Centers for Disease Control and Prevention.

The CDC and the World Health Organization announced the cause of the polio outbreak last week, even though they knew about it last year.

link to full article