From "Helpline", a newsletter published in the U.K.:

[CIMDA support] Re: J Dodd's vaccine protocol

I would like to make you aware that all 27 veterinary schools in North
America are in the process of changing their protocols for vaccinating
dogs and cats.

Some of this information will present an ethical & economic challenge to
vets, and there will be sceptics. Some organizations have come up with a
political compromise suggesting vaccinations every 3 years to appease
those who fear loss of income vs those concerned about potential side
effects. Politics, traditions, or the doctor's economic well-being
should not be a factor in medical decision.

"Dogs and cats immune systems mature fully at 6 months. If a modified
live virus vaccine is given after 6 months of age, it produces immunity,
which is good for the life of the pet (ie: canine distemper, parvo,feline
distemper). If another MLV vaccine is given a year later, the antibodies
from the first vaccine neutralize the antigens of the second vaccine and
there is little or no effect. The titer is not "boosted" nor are more
memory cells induced.

"Not only are annual boosters for parvo and distemper unnecessary, they
subject the pet to potential risks of allergic reactions and immune-mediated
haemolytic anaemia. "There is no scientific documentation to back up label
claims for annual administration of MLV vaccines "Puppies receive antibodies
through their mothers milk. This natural protection can last 8-14 weeks.
Puppies & kittens should NOT be vaccinated at LESS than 8 weeks. Maternal
immunity will neutralize the vaccine and little protection (0-38%) will be
produced. Vaccination at 6 weeks will, however, delay the timing of the
highly effective vaccine. Vaccinations given 2 weeks apart suppress rather
than stimulate the immune system. A series of vaccinations is given
starting at 8 weeks and given 3-4 weeks apart up to 16 weeks of age.
Another vaccination given sometime after 6 months of age (usually at 1 year
4 mo) will provide lifetime immunity."