Research Article

Letter: Vaccination of smallpox contacts.

Br Med J 1973; 4 doi: https://doi.org/10.1136/bmj.4.5889.423-a (Published 17 November 1973) Cite this as: Br Med J 1973;4:423

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

PDF extract preview