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.
Sneezing is a reflex of the upper airways, activated to explosively discharge irritating material from the nasal cavity. In cats, it is usually caused by the irritation of sensitive nerve endings in the mucous membrane that lines the nose. Nasal discharge is another sign of nasal disease or irritation. Although normal cats may occasionally sneeze or have nasal discharge (similar to human beings), severe, chronic or recurrent bouts of sneezing or nasal discharge suggest a more serious problem. Sneezing and nasal discharge often occur together.