Neutropenia is a blood disorder that can affect anyone. Some people are born with it. It can happen after a viral infection. In some cases the cause can be a side effect of a drug, or exposure to certain poisons. People can get neutropenia when treated for cancer with chemotherapy drugs. Sometimes it happens for no known reason.
Blood is made up of billions of cells. There are many different types of blood cells, but most of the time you hear about two kinds - red cells and white cells. There are more red cells than any other type of blood cell. They are very important as they carry oxygen from your lungs to all parts of your body. White blood cells are just as important, but for a very different reason. One of their jobs is to protect you from infection. There are several kinds of white cells. Each has a special function. The most common ones are: