An allergy is a hypersensitivity disorder of the immune system which results in the body’s negative reaction towards otherwise innocuous substances
Stomach infection is a collective term used for various problems of the gastrointestinal tract.
The most common type of infection that affects your eye is conjunctivitis. It is caused by an adenovirus (a kind of common cold virus).
Some bacteria can divide every 20 minutes – which means in only 8 hours a single bacterium can grow to nearly 17,000,000 bacteria?