You can become infected with hepatitis B if you are not immune (resistant) to the virus and you come into contact with the blood or body fluids of an infected person.
Many people with hepatitis B do not know they are infected.
The risk of hepatitis B for tourists is considered to be low. However, this risk will increase with certain activities, such as unprotected sex or receiving medical or dental treatment in a developing country (see below). Therefore, travellers are advised to get vaccinated against hepatitis B before visiting any country where this is a problem.
Exposure to infected blood
You are at risk of catching hepatitis B if you:
- inject drugs and share needles and other equipment, such as spoons and filters,
- have an open wound, cut or scratch, and come into contact with the blood of someone with hepatitis B,
- have medical or dental treatment in a country where equipment is not sterilised properly,
- work closely with blood (for example, healthcare workers and laboratory technicians are at increased risk of needlestick injury when the skin is accidentally punctured by a used needle),
- have a blood transfusion in a country where blood is not tested for hepatitis B,
- have a tattoo or body piercing in an unsafe, unlicensed place (see Risks of body piercing), or
- share toothbrushes, razors and towels that are contaminated with infected blood.
All blood donations in the UK are tested for hepatitis B.
Exposure to infected body fluids
You are at risk of catching hepatitis B if you have vaginal or anal sex with an infected person without using a condom.
Generally, your risk increases if you are sexually active and have unprotected sex with several different partners.
