From Google alerts....

Vaccination Concerns and Potential Side Effects for Dogs and Cats ...
By Lorie Huston
Currently, it is believed that sarcomas may occur as a reaction to any
feline vaccine, but rabies vaccines and feline leukemia vaccines are
thought to be more likely to have an association with sarcoma
formation than other feline ...
The Pet Health Care Gazette - http://www.pet-health-care-gazette.com/