It infects the lymph nodes of the oropharynx and the nasopharynx, and the spreads to other tissues. It infects and kills actively replicating cells. Kittens are most susceptible, but unvaccinated older cats can also become infected. | It infects the lymph nodes of the oropharynx and the nasopharynx, and the spreads to other tissues. It infects and kills actively replicating cells. Kittens are most susceptible, but unvaccinated older cats can also become infected. |