Public health authorities in Nigeria report continued, widespread transmission of Lassa fever in the country. In the first two weeks of 2022, 96 cases (including 11 deaths) have been reported from Bauchi, Benue, Cross River, Ebonyi, Edo, Kaduna, Kogi, Ondo, Oyo, Plateau, and Taraba States.
75% of these cases have come from Edo, Bauchi, and Ondo States.
Lassa fever is a type of viral haemorrhagic fever (VHF) endemic in parts of West Africa. Lassa virus is transmitted via the urine or droppings from infected rodents (Mastomys rats). Transmission can also occur via body fluids of infected people.
The risk to travellers becoming infected or developing Lassa fever is extremely low, unless living in conditions of poor sanitation and overcrowding in rural areas where these rodents are usually found.
Travellers to known Lassa fever outbreak areas must be made aware of the risk of infection and transmission routes of Lassa virus which is most commonly through:
Medical personnel travelling to work in an outbreak region must follow strict infection prevention control guidance.
Travellers returning from a Lassa fever outbreak area should seek rapid medical attention by contacting NHS 24 (Scotland) or NHS 111 (rest of UK) for advice prior to attending UK medical facilities if they develop fever and have:
For further information, see the TRAVAX Viral Haemorrhagic Fever page.