1997 vet. vaccine conference

As early as 1997 a limit in the frequency and amount of vaccines given was noted in the veterinary community:
FIRST INTERNATIONAL VETERINARY VACCINES AND DIAGNOSTICS CONFERENCE, Madison, WI, July, 1997 http://www.thepetcenter.com/exa/vac.html

Recommendations:
*Avoid vaccinations before six weeks of age. Give two to four doses of vaccine spaced three to four weeks apart.
*Give annual booster vaccine at one . . . → Read More: 1997 vet. vaccine conference