Tornado damages major Pfizer plant in US, hiking rival's shares

Nearly 25% of all sterile injectables used in US hospitals are produced at the severely-damaged North Carolina facility

Pfizer is the largest supplier in the US injectables market and Hikma the second-largest.

A  tornado that severely damaged a Pfizer plant in the US has helped boost the shares of rivals to the drugmaker. 

Pfizer said its plant in Rocky Mount, North Carolina, which is one of the world's largest sterile injectable product facilities, suffered heavy damage from a tornado.