Updated dengue 'green book' chapter published

The dengue chapter of the 'green book' (Immunisation against infectious disease) has been updated

Updated: 17 September 2026

Polio: Public Health Emergency of International Concern

An update on the polio Public Health Emergency of International Concern (PHEIC)

Updated: 15 September 2026
Take usual precautions

Mefloquine shortage

Shortage of 250mg mefloquine (Lariam) antimalarial tablets in the United Kingdom (UK) continues

Updated: 09 September 2026
Take usual precautions

Telephone advice line for health professionals: change to opening hours

The advice line opening hours will change from 7 September 2026

Updated: 04 September 2026

Ebola disease in DRC and Uganda

Case numbers continue to rise in the Democratic Republic of the Congo; this is now the country's largest recorded outbreak and remains a public health emergency of international concern

Updated: 27 August 2026
Take extra precautions

Cyclospora and summer travel

A reminder about Cyclospora infection and how to reduce your risk

Updated: 18 August 2026
Take usual precautions

Key to NaTHNaC alert level feature

LEVEL 1: GREEN
Take usual precautions
Follow standard protective measures, as recommended for this destination, disease or situation. Be aware that advice may change and check for updates.
LEVEL 2: AMBER
Take extra precautions
Follow any additional precautions recommended. Be alert and check regularly for changes in advice about this ongoing situation. Advice may be relevant for all travellers or apply to a specific group of travellers.
LEVEL 3: RED
FCDO advise against travel
The Foreign, Commonwealth & Development Office (FCDO) advise against travel on health grounds. This may mean avoiding non-essential travel, or all travel, follow the FCDO advice for details. Please note we do not report on FCDO safety and security alerts. Travellers should check the FCDO travel advisories for their destination for this information.

Alert categories are based on the situation at the time of publication. They will not be routinely updated unless outbreak information or a news item is updated.