Michelle Roberts
BBC
October 8, 2012

photoBy Photo Credit: James Gathany Content Providers(s): CDC [Public domain], via Wikimedia Commons

More than 700,000 people recently immunized against typhoid may not have full protection because of a dud vaccine that has now been recalled, say experts.

Manufacturer Sanofi Pasteur MSD has recalled 88% of its stock – 16 batches – of Typhim Vi vaccine because tests found some samples were too weak.

Anyone immunized with the vaccine since January 2011 could be affected.

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