Kris L. Christine wrote:
Dr. Karen Becker's article & interview with Dr. W. Jean Dodds on
veterinary antibody titers: http://tinyurl.com/nvj4s5m

-"Dr. Dodds explained that certain diseases produce what we call
'sterile immunity.' Those diseases include distemper, parvo, and
hepatitis in dogs, and panleukopenia in cats. When an animal is
exposed to these diseases and recovers, or is vaccinated properly
against them, the animal becomes immunized. ....
When an animal is properly vaccinated and becomes immunized, he
receives sterile immunity, which is long lasting -- a minimum of
seven to nine years, to a maximum of lifetime immunity -- as measured
by titer tests. This means the pet cannot become infected, nor will
he shed the virus should he be exposed."

"There are antibody titer levels, and there are things called immune
memory cells, which remain for a lifetime. Even with low titer values
following vaccination, pets may still be protected for up to a year or
even longer by immune memory cells...Dr. Dodds explains that she’s not
overly worried about a low distemper titer unless the pet is around
wildlife. She does worry about parvo. If a parvo titer comes back
negative on an ELISA and positive on an IFA, again, the results go to
the animal’s vet so he or she can make the judgment call. But Dr.
Dodds does discourage vets from delivering combination vaccines and
recommends instead a single parvovirus vaccine booster. Single-agent
vaccines are significantly less stressful to the body
immunologically."-

Dr. W. Jean Dodds videotaped interview on veterinary titers
http://www.youtube.com/watch?v=jQrh34kHB7s .

But did the good doctor explain why some diseases produce, "Sterile
Immunity" and others do not? Can he tell us why, exactly, some diseases have
the ability to do this and others do not? Is there some living vestage of
those diseases that remains in the body permanently that keeps one's immune
system perpetually on guard against any reinfection, or what?