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Risk: Be aware
Risk: Actions are required from individuals travelling or living in endemic area
Risk: Life threatening
28.09.2026
USA
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Update – The United States confirmed a mumps outbreak at San Diego State University in California. As of 18 September 2026, five confirmed or probable cases had been identified among student athletes from the same team.
Currently, the transmission at this location appears to be within a cluster.
| Date | Total number of cases | Number of new cases |
|---|---|---|
| 21 September, 2026 | 5 |
28.09.2026
USA
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Update – The United States confirmed that locally acquired dengue caused the death of an 80-year-old woman in Tampa, Florida. Hillsborough County reported at least 134 locally acquired cases during summer 2026.
This disease is being transmitted within the community.
| Date | Total number of cases | Number of new cases |
|---|---|---|
| 21 September, 2026 | ~134 |
28.09.2026
USA
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Update – The United States is investigating a suspected foodborne illness incident in Orange County, New York. Up to 20 people reportedly became ill after eating a catered lunch during an emergency drill attended by 154 people. The exact number of cases and the cause have not yet been confirmed.
Currently, the transmission at this location appears to be within a cluster.
| Date | Total number of cases | Number of new cases |
|---|---|---|
| 16 September, 2026 | ~20 |
28.09.2026
USA
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Update – The United States reported 693 measles cases across 38 counties in Pennsylvania during 2026, including four deaths. Two recent deaths involved unvaccinated individuals in Jefferson and Mifflin counties. This is Pennsylvania’s largest measles outbreak in more than three decades.
This disease is being transmitted within the community.
| Date | Total number of cases | Number of new cases |
|---|---|---|
| 16 September, 2026 |
28.09.2026
Mexico
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Update – Mexico reported five newborn deaths in a neonatal intensive care unit in Durango. A bacterium was detected, but it has not been confirmed as the sole cause.
Currently, the transmission at this location appears to be within a cluster.
| Date | Total number of cases | Number of new cases |
|---|---|---|
| 22 September, 2026 |
28.09.2026
Nicaragua
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Update – Nicaragua reported 3,109 chikungunya cases, including 2,122 identified during the previous six weeks.
This disease is being transmitted within the community.
| Date | Total number of cases | Number of new cases |
|---|---|---|
| 21 September, 2026 | 3109 | 2122 |
28.09.2026
Cuba
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Update – Cuba reported a food poisoning outbreak affecting 29 people, including 22 children, in Pedro Betancourt, Matanzas province. Eleven patients were transferred for specialised care, while the others remain under observation. No severe or critical cases were reported. The outbreak was linked to prepared food from a local establishment, and investigations are ongoing.
Currently, the transmission at this location appears to be within a cluster.
| Date | Total number of cases | Number of new cases |
|---|---|---|
| 20 September, 2026 | 29 |
28.09.2026
Canada
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Update – Canada recalled certain Alasko frozen whole raspberries sold in seven provinces due to possible norovirus contamination. The recall followed an investigation into a foodborne illness outbreak, with illnesses reported among consumers. The number of affected people was not disclosed.
Currently, the transmission at this location appears to be within a cluster.
| Date | Total number of cases | Number of new cases |
|---|---|---|
| 20 September, 2026 |
17.09.2026
USA
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Update – Dengue fever has affected 1,575 people in the United States and its territories in 2026, including 208 cases in Florida. Of the Florida cases, 73 were locally acquired, with Hillsborough County reporting the majority of local infections.
This disease is being transmitted within the community.
| Date | Total number of cases | Number of new cases |
|---|---|---|
| 13 September, 2026 | 1575 |
17.09.2026
USA
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Update – Measles has affected 163 people in Wisconsin, United States, with cases recently confirmed in Grant, Lafayette, and Iowa counties. Of the reported cases, 162 were unvaccinated.
This disease is being transmitted within the community.
| Date | Total number of cases | Number of new cases |
|---|---|---|
| 12 September, 2026 | 163 |
17.09.2026
USA
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Update – Salmonellosis has affected 22 people across four U.S. states, including 16 cases in Washington, with illnesses linked to broccoli sprouts produced by Evergreen Fresh Sprouts LLC in Idaho. Leftover broccoli sprouts collected from a patient also tested positive for the outbreak strain of Salmonella.
Currently, the transmission at this location appears to be within a cluster.
| Date | Total number of cases | Number of new cases |
|---|---|---|
| 11 September, 2026 | 22 |
17.09.2026
USA
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Update – Legionnaires’ disease has affected five people in the South Bronx, New York City, United States, with one death reported. Cases have been identified in the Morrisania and Melrose neighborhoods, while additional potential cases are being investigated. Water samples from cooling towers in the affected area are being tested to identify the source of the outbreak.
This disease is being transmitted within the community.
| Date | Total number of cases | Number of new cases |
|---|---|---|
| 11 September, 2026 | 5 |
17.09.2026
USA
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Update – Swine-origin influenza A(H1N2)v has affected three people in Michigan, United States, following exposure to pigs at an agricultural fair in Kent County. Two of the affected individuals were under 18 years old, and all reported cases are recovering without hospitalization.
Currently, the transmission at this location appears to be within a cluster.
| Date | Total number of cases | Number of new cases |
|---|---|---|
| 11 September, 2026 | 3 |
17.09.2026
Mexico
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Update – Dengue fever has been reported in Jicapore, an Indigenous community in the mountainous area of Sinaloa, Mexico, after residents developed fever, nausea, and severe headaches. Two adolescents reportedly died after experiencing symptoms consistent with dengue, while affected residents continue to receive medical care.
This disease is being transmitted within the community.
| Date | Total number of cases | Number of new cases |
|---|---|---|
| 13 September, 2026 |
17.09.2026
Brazil
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Update – Measles has been confirmed in three people in Tabatinga, Amazonas, Brazil, including two children aged one and eight years and a 24-year-old woman. All three patients are Peruvian nationals, and the cases were laboratory-confirmed in September 2026. One additional suspected case remains under investigation in Tabatinga, with another suspected case being investigated in Carauari.
Currently, transmission appears to be sporadic.
| Date | Total number of cases | Number of new cases |
|---|---|---|
| 11 September, 2026 | 3 |