Yellow fever update
Yellow fever cases continue to be reported in Africa and South America
Getting to grips with dengue
Registration is now open for our first ‘Getting to grips’ webinar of 2026
NaTHNaC
Online 
World Malaria Day 25 April 2026
World Malaria Day is an opportunity to highlight the progress that has been made in eliminating malaria, but also to remember that it remains a significant problem in some countries
Rabies vaccine shortage: advice for health professionals
Important advice on rabies vaccine shortage for health professionals
A food and water hygiene reminder for travellers
New research highlights the importance of raising awareness among UK travellers about stomach bugs and other travel-related gut infections
RCN and NaTHNaC 9th Joint Travel Health Conference 2026
Featuring the latest updates and future trends in travel health
NaTHNaC
Royal College of Nursing
Online Mefloquine shortage
Shortage of 250mg mefloquine (Lariam) antimalarial tablets in the United Kingdom (UK) until the end of April 2026
Avloclor (chloroquine tablets) discontinued and Malarivon (chloroquine syrup) out of stock
Updated information for health professionals on the supply of chloroquine for malaria chemoprophylaxis
UKHSA publishes travel-associated infections report
Case numbers of selected travel-associated infections reported in England, Wales and Northern Ireland during 2025
Yellow fever in Bolivia
Between 1 January and 21 April 2026, a total of five cases of yellow fever have been reported in Bolivia with two deaths. Please see our Topics in Brief article for further details on yellow fever.
CVDPV1 in South Sudan
As of 20 April 2026, two cVDPV1 cases were reported from the Upper Nile region. Onset of paralysis in both cases was February 2026. Please see our Topics in Brief article for further details on polio.
Dengue in Tonga
As of 20 April 2026, a total of 24 laboratory confirmed dengue cases have been reported in Tonga for 2026. The Ministry of Health have declared a dengue outbreak following an increase in confirmed and suspected cases, along with evidence of community transmission across Eua, Ha‘apai and Tongatapu. Please see our Topics in Brief article for further details on dengue.
Zika in France ex Indonesia
Between July 2025 and March 2026, 11 travel-associated cases of Zika virus disease have been reported in France linked to travel to Indonesia, including all four cases detected in early 2026. Most cases were associated with travel to Bali and neighbouring islands. Please see our Topics in Brief article for further details on Zika virus.
Zika in Bolivia
As of 28 March 2026, a total of 1,168 cases of Zika virus disease have been reported in Bolivia since the start of 2026. This represents a large increase compared to the same period in 2025. 1,224 cases were recorded for the whole of 2025. Please see our Topics in Brief article for further details on Zika.
Oropouche virus disease in Colombia
As of 19 March 2026, a total of 21 cases of Oropouche virus disease (OROV) were reported in Colombia during 2025. Please see our Topics in Brief article for further details on Oropouche virus disease.
Undiagnosed illness in Burundi
As of 11 April 2026, a total of 35 cases of an undiagnosed illness, including five deaths, have been reported in Mpanda district, in the north of Burundi. Symptoms include fever, abdominal pain, vomiting, diarrhoea, blood in urine and fatigue. Some severe cases have also presented with anaemia and jaundice. Currently, laboratory testing is negative for Ebola and Marburg virus diseases, Rift Valley fever, yellow fever and Crimean-Congo haemorrhagic fever. Investigations are ongoing.
Influenza A(H9N2) in Italy ex Senegal
On 10 April 2026, the World Health Organization reported the first imported human case of avian influenza A(H9N2) in Italy. The case was in an adult returning from Senegal. This is also the first imported human case of avian influenza A(H9N2) reported in the European Region. Please see our Topics in Brief article for further details on avian influenza.
Lassa fever in Nigeria
In 2026, up to 29 March, 3,831 suspected, 663 confirmed and five probable cases, and 167 deaths have been reported across 22 states. Of all confirmed cases 85% were reported from five states (Bauchi, Ondo, Taraba, Edo and Benue). Please see our Topics in Brief article for further details on Lassa fever.
Hantavirus in Argentina
Between 1 January and 28 March 2026, 32 confirmed cases of hantavirus infection and eight deaths have been reported. Cases have been reported in the following provinces: Buenos Aires, Salta, Chubut, Río Negro, Entre Ríos and Jujuy. Please see UKHSA guidance for more details on hantavirus.
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