Medical Engineering encompasses a broad range of activities, and is alternatively called Bioengineering and Biomedical Engineering.
Just like humans, cats can develop allergies to things in the environment. Cat allergies can be caused by many different things, and the cause usually has to be figured out by a process of elimination. Sneezing that's caused by an allergy is often accompanied by scratching and other skin problems. These include frequent rubbing of the face and excessive grooming which may cause hair loss.
There is most often a high fever present along with feline sneezing caused by the herpes virus and pneumonia can develop, especially in kittens or immunosuppressed cats. The disease most often begins with sneezing and red eyes, but can quickly worsen and secondary bacterial infections can develop.