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Hepatitis B
The hepatitis B virus is one of the most prevalent blood-borne viruses worldwide and is a major cause of chronic liver disease and liver cancer
Updated: 05 June 2025
Japanese encephalitis
Japanese encephalitis is transmitted to humans in predominantly rural parts of Asia and the Western Pacific especially where rice growing and pig farming are common
Updated: 02 June 2026
Malaria
Malaria is a serious and potentially life-threatening disease, transmitted to humans through the bite of infected female Anopheles spp. mosquitoes
Updated: 02 June 2026
Tick-borne encephalitis
Tick-borne encephalitis is a viral infection which can cause a range of symptoms from a mild and short-lived febrile illness to a severe infection of the central nervous system
Updated: 16 May 2024
Explore more
Hepatitis B
The hepatitis B virus is one of the most prevalent blood-borne viruses worldwide and is a major cause of chronic liver disease and liver cancer
Updated: 05 June 2025Japanese encephalitis
Japanese encephalitis is transmitted to humans in predominantly rural parts of Asia and the Western Pacific especially where rice growing and pig farming are common
Updated: 02 June 2026Malaria
Malaria is a serious and potentially life-threatening disease, transmitted to humans through the bite of infected female Anopheles spp. mosquitoes
Updated: 02 June 2026Tick-borne encephalitis
Tick-borne encephalitis is a viral infection which can cause a range of symptoms from a mild and short-lived febrile illness to a severe infection of the central nervous system
Updated: 16 May 2024Infectious diseases
Dengue
Dengue is an infection caused by the dengue virus of which there are four different subtypes. The disease is transmitted by mosquitoes
Updated: 02 June 2026Chikungunya
This viral infection occurs in some tropical and subtropical regions of the world, predominantly transmitted through the bite of an infected Aedes mosquito
Updated: 12 May 2026Yellow fever
Yellow fever is caused by a virus, which circulates between infected monkeys or humans and mosquitoes
Updated: 18 February 2026Preparing for healthy travel
Medicines and travel
Carrying medication abroad and advice regarding falsified medication
Updated: 24 October 2025Travel Insurance
Travellers must declare medical conditions when taking out travel insurance to ensure they are suitably covered
Updated: 06 December 2021Special risk travel/traveller
Travelling with additional needs and/or disability
This factsheet provides an overview and advice on the points to consider when travelling with additional needs and/or disability
Updated: 12 September 2025Areas of humanitarian crisis
For humanitarian aid workers and those advising those travelling to areas of conflict or disaster
Updated: 07 April 2025Clinic resources
Vaccines and medicines: availability, supply, shortages and use of unlicensed medicines
Information for health professionals on availability of vaccines and use of unlicensed products
Updated: 08 June 2026'Getting to Grips...' online events and video guides
Online guides and webinar sessions for health professionals interested in travel health
Updated: 05 May 2026The green book travel chapters
UK Health Security Agency Immunisation against infectious disease, the 'green book' travel chapter updates
Updated: 15 October 2024
