For healthcare professionals only


Inoculation of Human Volunteers with E.C.H.O. Virus Type 20

Br Med J 1961; 1 doi: (Published 11 February 1961) Cite this as: Br Med J 1961;1:397

This is a PDF-only article. The first page of the PDF of this article appears below.

PDF extract preview

Log in

Log in through your institution


* For online subscription