Emily
Editor, Senior Moderator
http://www.bbc.co.uk/news/health-19873171
8 October 2012 Last updated at 12:14 ET
Typhoid vaccine failure warning
By Michelle Roberts Health editor, BBC News online
More than 700,000 people recently immunised 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 immunised with the vaccine since January 2011 could be affected...