If one goes to the following site and clicks on peppers you can see for yourself the number of diseases that can be seed borne. This company can inspect seed lots for all these diseases and genetic purity. I think if my seeds went thru that testing I would say that they were close to being disease free. Although I have found a seed borne disease called pythium which is normaly in other crops. Don't know if it can be passed in peppers. I am sure there are others that can do them same, I don't know of them. http://www.calspl.com/