Protection against pertussis by immunisation.Br Med J 1980; 281 doi: https://doi.org/10.1136/bmj.281.6255.1636-d (Published 13 December 1980) Cite this as: Br Med J 1980;281:1636
Log in using your username and password
Log in through your institution
Register for a free trial to thebmj.com to receive unlimited access to all content on thebmj.com for 14 days.
Sign up for a free trial