GENEVA (AP) -- The World Health Organization has warned countries that a 'dangerous' strain of polio has spread to China from Pakistan.
The U.N. health agency says a genetic link has been confirmed between wild poliovirus type 1 detected in China and a strain circulating in Pakistan.
It says there have been seven confirmed cases involving the WPV1 strain detected in China's Xinjiang province, which borders Pakistan, in the past two months.
WHO spokesman Oliver Rosenbauer says type 1 is more dangerous than type 3 because it is more likely to cause paralysis and spreads more easily. Type 2 polio has been eradicated.
The global health body says countries should strengthen their disease surveillance systems and travellers to Pakistan should be vaccinated against polio.
(Copyright 2011 by The Associated Press. All Rights Reserved.)
To comment, the following rules must be followed:
Comments may be monitored for inappropriate content, but the station is under no legal obligation to do so.
If you believe a comment violates the above rules, please use the Flagging Tool to alert a Moderator.
Flagging does not guarantee removal.
Multiple violations may result in account suspension.
Decisions to suspend or unsuspend accounts are made by Station Moderators.
Questions may be sent to firstname.lastname@example.org. Please provide detailed information.