Last year Baxter recalled almost all of its injections of the blood thinning heparin drug in the US after some patients experienced extreme - and in some cases fatal - allergic reactions, after being administered the products.
The FDA has accused two Chinese manufacturers of being responsible for the production and shipment of the tainted vaccines, suggesting that a cheaper synthetic heparin mimic, subsequently identified as over-sulfated chondroitin sulfate (OSCS), was used to decrease costs.