In Loving Memory of Bessy & Junior


What are Vaccine - Associated  Sarcomas ?

Vaccine-Associated Sarcomas, otherwise known as VAS, or injection site sarcomas, are malignant soft tissue tumors that are found at or near the site of the vaccination. They form in the muscle, skin and connective tissue.  

How does a sarcoma develop ?

Inflammation following vaccinations is considered a factor in the development of VAS. The vaccines that are most often associated with sarcoma development are the Feline Leukemia and Rabies vaccines, although it has been known that there have been some cases of sarcoma that have developed from distemper vaccinations.

Can I tell if my cat is going to get VAS after being vaccinated ?

  • Look for a lump that persists for more than three weeks after vaccination.
  • Look for any redness around the vaccination site.
  • See if the lump is larger than one inch.
  • Check to see if the lump is increasing in size.
  • If you see any of these signs consult your veterinarian.  

Before you vaccinate, ask yourself these questions:

  • Is my cat sick now? 
  • Has my cat ever had a bad reaction to a vaccination before ?
  • Does my cat have an immune system disorder?
  • Did I ask my vet for information on vaccine side effects?
  • Do I know how to identify a vaccine reaction ?
  • Do I know how to report a vaccine reaction ?
  • Do I know the vaccine manufacturer's name and lot number of the vaccine  being given?
  • Does my vet follow vaccine protocol?
  • Did my vet warn me about the risks of vaccines?
  • Is my vet giving my cat all the vaccines at once?
  • Can my vet provide me with scientific evidence that supports annual vaccines?

 Did you know ?

You can minimize unnecessary side effects and adverse reactions by avoiding unnecessary vaccinations.

Vaccines are not backed by scientific data to support label directions for re-administration of MLV vaccines yearly.

Some three-year rabies vaccines are re-labeled and used as one-year rabies vaccines. The drug manufacturers simply change the label according to the state's requirements. 

Feline-Associated Sarcoma (VAS) can appear up to and over ten years once the vaccines are stopped.  

The duration of immunity for annual vaccinations for Rabies, Distemper and Parvovirus has been scientifically proven to be over 7 years, and maybe the life of the pet.

The immunity induced by your pet's first vaccine is blocked by the next vaccine. And your pet is being exposed to an unnecessary risk for an adverse reaction.

Most veterinarians will tell you that Vaccine-Related Sarcoma is rare. This is because most veterinarians DON'T report these reactions. The only way my two vas cats' reactions were reported was through me.

Titers testing measures the amount of antibodies in the blood.  The test will determine if your pet's last vaccination is still working. The cost should not be much more than a vaccination. It's worth the test to avoid the unnecessary vaccination. 

About this website:

This website was created in  memory of  my beloved Bessy and Junior who became victims of the VAS monster. It's also for information and educational purposes only. It is not intended to be a substitute for veterinary advice. If you think you have a need for medical attention or concerns, consult your veterinarian or  veterinarian oncologist.

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