I have read about a new vaccine (it is supposed to be safer and effective). It is available to help reduce the number of shots a dog would receive. It protects against destemper, hepatitis and parvovirus. It is called Continuum DAP. It needs to be given only once every three years, as opposed to once a year shots. It can be given to dogs as early as six weeks of age. I have done no further research as to this vaccine, and have never used it. But it would be great if they could make one for the rest of the dreaded dog diseases as well. The article was posted in my local newspaper. Haven't checked the web yet. Julie.