Dr. Fredrickson, Director 
NIH 
December 26, 1979 
Bethesda, Md . 2 02 05 
Dear Dr. Fredrickson, 
Please approve as quickly as possible 
the 1 1 1 -(>0) paragraph of the guidelines 
(Federal Register 44, p. 69210). As a lab- 
oratory assistant I believe that working with 
P2 or P3 containment is more dangerous for 
us than working in a PI laboratory. Also, 
we believe the danger you are trying to 
contain is mostly imaginary. 
Sincerely yours, 
S' ‘ 
Tim Durfee 
Medical Genetics? 
University of Wisconsin 
Madison, WI 53706 
[ 599 ] 
