Dr. Fredrickson 
Page 2 
3) Physical containment . The containment protocols have been 
escalated. The new PI is almost identical to the present P2. I strongly 
feel that the changes in the requirements for physical containment is a 
serious matter and should not be done unless clear justification is given. 
Such justification is not given. Why are the physical containment levels 
being raised? Will all experiments soon require present P3 level con- 
tainment? 
I hope my comments are of help to you; I feel that they are very 
important and request that you treat them seriously. 
Sincerely your^, 
. •’ ' 
-v <•* c ’-'-*** 
Ronald W. Davis 
Associate Professor of Biochemistry 
(I was one of the original eleven signers 
RWD/lh of the Science Biohazard Letter. ) 
[Appendix A — 32] 
