UNIVERSITY OF MICHIGAN
SCHOOL OF PUBLIC HEALTH
ANN ARBOR, MICHIGAN

DEPARTMENT OF EPIDEMIOLOGY
VIRUS LABORATORY August 4, 1959

Dr. Joshua Lederberg
Professor of Genetics
Stanford University
Stanford Ualifornia

Dear Doctor Lederberg:

Thank you very much for your letter of July 29 and the provocative
questions it provides. Since I am trying to clear up so that I can
get away for a vacation, I shall not have the opportunity to read
this with any care before I leave. Nevertheless, I think this might
be an interesting thing to cogitate about upon the lake.

I do not want to join in this activity with any presumptions or
misconceptions. I think part of my expressed interest was related
to back contamination on man and the need therefore for preparing
epidemiological and long term observations of any exposed persons.

Your comments about the Westex meeting is of a good deal of interest,
but I don't see how I could possibly come in September even though

it would be a great experience to attend the dedication. In the
meantime I shall try, as I have said, to see if any ideas can be

developed. [ ybewk _ * Live Lev fee. Ata At ung weal phere Coy ‘to

ae wu a thetg (x \

Sincerely yours,

J A
‘ GC Kae -y Git LIN
Thomas Francis, Jr., M.D. V

TE: sbb Professor and Chairman