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Mpox and Oropouche outbreaks

Multi-country outbreaks of mpox clade I and Oropouche are ongoing. Keep up to date with these links if you are travelling to affected areas.

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30 May 2025

cVDPV2 in Germany

During the week ending 28 May 2025, one circulating vaccine-derived poliovirus type 2 (cVDPV2) positive environmental sample was reported, collected on 21 April, from Sachsen, Germany. Please see our Topics in Brief article for further details on polio.

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30 May 2025

Yellow fever in Ecuador

In 2025, up to 23 May 2025, 8 confirmed yellow fever cases and 6 deaths were reported in Ecuador. Most cases have been reported in Zamora Chinchipe Province (4 cases), and amongst males (6 cases).  Please see our Topics in Brief article for further details on yellow fever.

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29 May 2025

Lassa fever in Nigeria

As of 18 May 2025, a total of 5,118 suspected cases of Lassa fever, (733 confirmed) including 141 deaths have been reported in Nigeria during 2025. 18 states have reported at least one case, the majority from Bauchi, Taraba and Ondo states. Please see our Topics in Brief article for further details on Lassa fever.

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29 May 2025

Crimean-Congo haemorrhagic fever in Spain

On 28 May 2025, local health officials have reported a confirmed case of Crimean-Congo haemorrhagic fever (CCHF) in Salamanca. The case was exposed via a tick bite. Please see our Topics in Brief article for further details on CCHF.

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28 May 2025

Zika in Brazil

Between 1 January and 17 May 2025, a total of 11,592 cases of Zika virus disease have been reported in Brazil. Please see our Topics in Brief article for further details on Zika.

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28 May 2025

Zika in Argentina

Between 1 January and 17 May 2025, a total of 654 cases of Zika virus disease have been reported in Argentina. Please see our Topics in Brief article for further details on Zika.

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28 May 2025

Zika in Bolivia

Between 1 January and 17 May 2025, a total of 348 cases of Zika virus disease have been reported in Bolivia. Please see our Topics in Brief article for further details on Zika.

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27 May 2025

Dengue in Kiribati

As of 22 May 2025, a total of 55 confirmed and 163 suspected dengue cases have been reported. The serotypes responsible for this current outbreak are dengue virus type 1 (DENV-1) and dengue virus type 2 (DENV-2). Please see our Topics in Brief article for further details on dengue.

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Dengue in Cook Islands

As of 22 May 2025, the Cook islands Ministry of Health declared a dengue fever outbreak in Rarotonga. Seven locally acquired cases have been reported in the last 18 days. Please see our Topics in Brief article for further details on dengue.

Take usual precautions
27 May 2025

Dengue in Samoa

As of 19 May 2025, a total of 110 confirmed cases of dengue (including one death) have been reported since the declaration of the outbreak on 17 April 2025. The majority of cases (77%) are from Upolu Island. Of the 20 cases that have confirmed serotypes, 85% are DENV-1 and 15% are DENV-2. Please see our Topics in Brief article for further details on dengue.

Take usual precautions
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