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Ebola and Oropouche outbreaks

Ebola cases have been reported in Democratic Republic of Congo and Uganda. A multi-country outbreak of Oropouche is ongoing. Keep up to date with the news and outbreak information if you are travelling to affected areas.

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02 June 2026
Madagascar + Sud-Ouest

cVDPV1 in Madagascar

As of 27 May 2026, one circulating vaccine-derived poliovirus type 1 (cVDPV1) case was reported in Madagascar, with onset of paralysis on 4 April 2026, from Sud-Ouest province. It is the first cVDPV1 case reported from the country since 2023 and is genetically linked to a virus detected in the country in 2022. Please see our Topics in Brief article for further details on polio.

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Ebola disease in DRC

As of 1 June 2026, the Democratic Republic of the Congo's Ministry of Health reported a total of 321 confirmed Ebola disease cases and 48 confirmed deaths, with 220 suspected cases, as part of the ongoing Ebola outbreak. Please see our Topics in Brief article for further details on Ebola disease.

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02 June 2026

Ebola disease in Uganda

As of 2 June 2026, a total of 15 confirmed Ebola disease cases, with one confirmed death, have been reported in Uganda. Please see our Topics in Brief article for further details on Ebola disease.

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29 May 2026

Hantavirus - cruise ship

As of 27 May 2026, a total of 13 cases of Andes virus (eleven confirmed and two probable), including three deaths, have been reported in relation to the outbreak which began on the MV Hondius cruise ship. Please see our Topics in Brief article for further details on hantavirus.

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28 May 2026

Mpox in Colombia

As of 25 May 2026, three cases of clade Ib mpox have been reported in Colombia. Previous cases reported in Colombia have reported travel history to Spain and Belgium. Please see our Topics in Brief article for further information on mpox.

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28 May 2026

Mpox in Slovakia

As of 25 May 2026, five cases of clade Ib mpox have been reported in Slovakia. These are the first reports of confirmed clade I mpox in Slovakia. On 13 April 2026, a case of clade I mpox in Poland was reported with travel history to Slovakia. Please see our Topics in Brief article for further information on mpox.

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28 May 2026
USA

Mpox in USA

Since November 2024, and as of 22 May 2026, 20 cases of clade I mpox have been reported in the United States. Clade Ib mpox has been sequenced from clade I cases in the US. Please see our Topics in Brief article for further information on mpox.

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27 May 2026

Measles in Japan

As of 20 May 2026, a total of 498 measles cases have been reported in Japan for 2026. Please see our Topics in Brief article for further details on measles.

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27 May 2026

Lassa fever in Nigeria

As of 10 May 2026, a total of 793 confirmed Lassa fever cases, with 5,034 suspected, five probable cases and 204 deaths, have been reported across 23 states in Nigeria for 2026. This includes 45 cases in health workers. Please see our Topics in Brief article for further details on Lassa fever.

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26 May 2026

Diphtheria in Australia

On 18 May 2026, the Australia Centre for Disease Control reported an increase in the number of diphtheria cases across Australia, with a total of 221 confirmed cases reported in 2026. The majority of cases have been reported in the Northern Territory (133 cases) and Western Australia (79 cases). Please see our Topics in Brief article for further details on diphtheria.

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