Figure 6.
Detail from ‘The unknown guardian angels have faces’ photo story, World Health, September–October 1963, pp. 48–9. Copyright WHO.86
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.