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.
Cats sneeze for many reasons, but if your cat or kitten sneezes a lot you may start to worry that there's something wrong. If sneezing is the only symptom your cat displays -- i.e., no discharge from eyes or nose, good appetite, no change in behavior or activity level -- then it is probably of no concern. However, when ocular or nasal discharge is seen, the cat may have a cold or upper respiratory infection.