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.
One of the most common causes of feline sneezing is a respitatory tract infection such as flu. In these cases, the sneezing is often accompanied by fever, a thick discharge from the nose and sometimes the eyes, loss of appetite and sores in the mouth. If you think this is the cause of your cat's excessive sneezing, you should consult a vet.