The Delta 32 genetic mutation prevents HIV; it's been found in the DNA of those who didn't get this Medieval scourge
.... Once the world's worst health scourge, the plague today affects ... Oh 
and since the CDC says it's "Safe", he probably didn't need a BSL-3 or ... bear in 
mind that a mutation of the CCR5 gene -- called "delta 32" in its... [DOC] [TLE] Centers for Disease Control and - To Parent Directory - CDC [PAR] These factors may be genetic mutations, which will certainly be selected.