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Posts by Outbreak News Today | Robert Herriman | Substack

Argentina reports hundreds of new chikungunya cases In a follow-up on the chikungunya outbreak in Argentina, the Argentina National Epidemiological Surveillance System (BEN) reports 268 new cases of chikungunya fever during the week ending April 11.

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Chikungunya in French Guiana update In the follow-up on the chikungunya situation in French Guiana, on the northeast coast of South America, since the first locally acquired case was confirmed on January 26, 2026, several cases have been identified in the territory.

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Brazil makes progress in controlling dengue and malaria Dengue fever

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Canada: Salmonella outbreak linked to Hamilton, Ontario restaurant Hamilton Public Health officials report investigating a salmonella outbreak linked to the Piper Arms Stoney Creek, located at 1786 Stone Church Road East, Stoney Creek.

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Anthrax outbreak in Vihiga County, Kenya Health officials in Vihiga County in western Kenya report a cutaneous anthrax outbreak within Emuhaya Subcounty.

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Philippines: Measles in Quezon City The cases of measles in Quezon City have reached 143 from January 1 to April 16 this year.

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Local cholera case reported on the Cayman Islands The Ministry of Health, Environment & Sustainability and the Public Health Department confirm that a laboratory result from a patient in the Cayman Islands indicated the presence of a cholera-related bacteria and is under active review.

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San Francisco: Syphilis and other STI's down, First case of clade I mpox Sexually transmitted infections

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North Carolina reports increase in Legionnaires’ disease In 2024, North Carolina health authorities reported 201 Legionnaires’ disease cases statewide throughout the year.

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Bolivia: Yellow fever health alert declared in Santa Cruz Authorities in the eastern department of Santa Cruz—Bolivia’s most populous region—declared a “health alert” this Wednesday following a yellow fever outbreak that has so far claimed one life, prompting the activation of preventive measures to contain the disease’s spread.

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Costa Rica: Health officials confirm fifth case of chikungunya The Costa Rica Ministry of Health confirms the fifth positive case of Chikungunya fever in the country in 2026, according to the results issued by the laboratory of the Costa Rican Institute of Research and Teaching in Nutrition and Health (INCIENSA).

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Bangladesh measles: 20,000 cases in one month In a follow-up on the measles outbreak in Bangladesh, since the outbreak began on March 15, the Directorate General of Health Services (DGHS) in Dhaka reports 20,352 total cases, including 3,065 confirmed measles cases as of April 17.

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Chagas disease in Paraguay In Paraguay, Chagas disease is distributed throughout the country with varying levels of endemicity.

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Costa Rica reports 4th chikungunya case of 2026 The Costa Rica Ministry of Health reports a fourth positive case of chikungunya has been confirmed so far in 2026.

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Taiwan reports increase in gastrointestinal illness Taiwan health officials said that the recent warm and humid weather has accelerated the reproduction of pathogens such as bacteria, increasing the risk of transmission of intestinal infectious diseases.

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Dengue fever and hand, foot and mouth disease cases on the rise in Vietnam Several infectious diseases such as hand, foot and mouth disease and dengue fever have been on the rise in many localities, especially in the South, recently.

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Dengue cases confirmed in Tonga The Tonga Ministry of Health confirmed three dengue fever cases in Tongatapu.

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Chikungunya in Argentina: Salta is the epicenter In a follow-up on the chikungunya outbreak in Argentina, health authorities report a total of 433 chikungunya cases—357 are autochthonous, while only 76 have a history of travel (imported cases) to Bolivia, Brazil, Paraguay, and Cuba.

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Nigeria: Lassa fever remains active and increasing Nigeria health officials continue to report increasing and geographically spreading Lassa fever cases in 2026.

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Senegal reports 2nd human CCHF case of 2026 During the week ending April 4, Senegal health authorities reported an additional Crimean Congo hemorrhagic fever (CCHF) case.

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Anthrax outbreak in western Uganda Health officials in Uganda report an anthrax outbreak in the western Ugandan district of Kitagwenda.

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DRC: More than 4,600 cases of cholera reported in South Kivu in 1st quarter of 2026 According to data from the South Kivu Provincial Health Division (DPS) Friday, 4,607 cases of cholera were reported in South Kivu in the first quarter of 2026, including 67 deaths in the province.

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Bangladesh measles outbreak grows, Vaccination campaign enters second phase In a follow-up on the measles outbreak in Bangladesh, the second phase of the measles vaccination campaign will begin today in Barishal City Corporation (BCC) and Dhaka, in line with the countrywide initiative to protect children from preventable diseases.

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Costa Rica reports 3rd chikungunya case on 2026 Costa Rica health officials report the confirmation of the third positive case of chikungunya in the country during 2026, according to the results issued by the CCSS laboratory.

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Philadelphia reports increase in C. auris The Philadelphia Department of Public Health (PDPH) issued an advisory to healthcare facilities, providers, and laboratories concerning an increase of Candida auris, also known as Candidozyma auris, in the city and to take action to contain its spread.

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Pennsylvania: Pertussis outbreak in Bedford and Fulton Counties The Pennsuylvania Department of Health reports that since March, they have seen an increase in pertussis cases in Bedford and Fulton counties in the southwest of the state.

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Philippines report rise in measles/rubella cases in first quarter of 2026 Philippines health officials report a significant increase in measles and rubella cases during the first three months of the year compared to the same period in 2025.

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Hong Kong hepatitis A cluster update In a follow-up on the hepatitis A cluster in Hong Kong, the Centre for Health Protection (CHP) reports a decrease in cases since February.

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Guam confirms 1st pertussis outbreak The Guam Department of Public Health and Social Services (DPHSS) reported two new laboratory confirmed Bordetella pertussis (pertussis) reports this week, bringing the total number of confirmed cases for 2026 to nine.

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Pakistan: Mpox cases in Sindh According to Sindh Health Minister, Dr Azra Fazal Pechuho, a total of 14 mpox cases have been confirmed across the province this year — 12 in Khairpur and two in Karachi.

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