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An anaesthetic is a drug or agent that produces a complete or partial loss of feeling.

Some forms of liver disease are inherited, while others are caused by lifestyle factors.

Cirrhosis is a type of liver damage where healthy cells are replaced by scar tissue.

Leptospirosis is a disease spread from animals to humans, caused by infection with the bacteria Leptospira.

Fluid retention (oedema) occurs when fluid isn't removed from the body tissues, including the skin. Causes include the body's reaction to hot weather, a high salt intake and menstrual cycle hormones.

There is no evidence that preeclampsia is caused by emotional stress, working too hard or not getting enough rest.

A wide range of illnesses, conditions and events can cause coma.

If you are travelling or passing through areas infected with yellow fever, some countries require you to be vaccinated.

Immunisation is the best protection against hepatitis A infection and it is recommended for people in high-risk groups.

It is dangerous to take kava in combination with alcohol or other psychoactive drugs.