how long does upper respiratory last in cat
How long does a typical upper respiratory infection last? Once a cat is exposed to an infectious agent, it will go through an incubation period of 2-10 days before developing symptoms. If the infection is uncomplicated, it will typically last for 7-21 days, depending on the particular disease agent with 7 to 10 days being average duration of illness. During this entire time, the cat will potentially be infectious to other cats.