blood cell

After drinking a lot of alcohol - which many students will be doing to overcome nerves - your body produces fewer white blood cells, which help to fight off infections.

It replaces damaged blood cells with healthy ones.

Folate, also known as vitamin B9, is found in many foods and helps the body form health red blood cells.

Specifically, chronic exposure to ethylene oxide over many years increases the risk of cancers of the white blood cells, such as non-Hodgkin lymphoma, as well as breast cancer, according to the EPA.

In APDS, an enzyme produced in the body is "switched on" all the time, disrupting the development of white blood cells and causing the immune system to be disregulated.