Pfizer and AstraZeneca logos
Media playback is unsupported on your device

AstraZeneca Pfizer takeover bid explained

US drug giant Pfizer has pledged to preserve UK jobs if it wins the takeover of AstraZeneca but a leading scientists has dismissed the guarantees as "vague".

The BBC's Dominic Laurie takes a look at the background of the companies.

  • 13 May 2014
Go to next video: Drug firm chiefs grilled by MPs