January 28, 1970

Dr. P. Dorolle

Deputy Director

World Health Organization
Geneva, Switzerland

Dear Dr. Dorolle:

I was most interested to see your article "Old Plagues in the Jet Age" in
a recent issue of the WHO Chronicle. I had not before seen such a frank
discussion of the possibilities of renewed outbreaks of pandemic disease,
an issue whose neglert has troubled me for some time. I would be most
apprectative if you wouldg@avor me with a reprint copy of this article,
and other writings that you may have available on the same aubject. I
would also be grateful for any bibliographies that might be especially
pertinent to it.

Sincerely yours,

Joshua Lederberg
Professor of Genetics