Definitely. Disease is spread by contact with "other". I am immune to my own germs and the germs of my loved ones and neighborhood. Thanx for the reminder. I tend to think of Chinese shipping crates as "my neighborhood" but I live in LA now and crates often carry more than parasites and cargo. Human traffickers move people in them, often sick people. Someone who sells a crate is not going to mention the stow away's with TB they found. Harper