I was never warned by my vet of the risks. My 11 year old
cat Rumi got the feline leukemia
vaccine June 17, 2014. Four days later we noticed a lump at the vaccine site. By July 11, 2014, only 3 weeks later, the mass on her leg was the size of half golf ball. The vet suggested we contact the vaccine producer to see if there were other adverse reactions to that batch of vaccine.