Pandemiology Watch (October 8-14, 2025)

Emerging outbreaks
Senegal.
The Senegalese health ministry reported on October 9, 2025, that 17 people have died and 119 cases have been confirmed in the ongoing Rift Valley Fever outbreak.
Ebola
Democratic Republic of the Congo.
According to the World Health Organization on October 12, no new Ebola cases have been detected in the Democratic Republic of the Congo for sixteen days, indicating that the outbreak is under control. In total, 64 cases (53 confirmed, 11 probable) and 43 deaths (32 confirmed, 11 probable) have been reported in Kasai Province.
MPOX
Africa.
Sierra Leone: The latest update from the World Health Organization shows 5,405 confirmed mpox cases as of October 5, a surge of 60 cases since September 28. According to the most recent report from Africa CDC on October 14, the outbreak was linked to clade 2b. Among confirmed cases, 6.5% were in children under 15 years and 52% in males, with a 77% positivity rate.
Uganda: As of October 5, 2025, Uganda reported 6,894 confirmed mpox cases, according to the World Health Organization. This is an increase of 79 cases since September 28. Testing shows a 48,31% positivity rate.
Guinea: As of October 5, 2025, The World Health Organization has reported 1,051 cases in 2025 and one death in Guinea. This is an increase of 13 cases since September 28. Testing shows a 42% positivity rate, and the outbreak is linked to clade 2b.
MEASLES
Israel.
The Israeli Ministry of Health reported on October 10, 2025, that a 1-year-old child has died from measles in Jerusalem, marking the seventh fatality in the ongoing outbreak.
U.S.
As of October 8, 2025, Center for Disease Control reports a total of 1,563 confirmed measles cases in the U.S. in 2025. 12 % of cases have required hospitalization (193 cases of 1,563), and three deaths have been reported.
Canada.
As of October 14, 2025, Canada has reported 5,060 measles cases where 70% occurred in children, according to the Public Health Agency of Canada. Ontario accounts for 47% of the cases, followed by Alberta with 38%. 88% were unvaccinated, and 7% required hospitalization. Genotype D8 remains the most frequently detected strain. 1 death has been reported.
POLIO
As of October 12, the Global Polio Eradication Initiative reports new poliovirus detections, including two WPV1 cases in Afghanistan, two cVDPV2-positive environmental samples in Chad, and seven cVDPV2-positive environmental samples in Papua New Guinea.
H5N1
U.S.
As of October 14, Centers for Disease Control and Prevention has not reported any cases of person-to-person transmission of H5N1 in the United States. The total remains at 70 confirmed cases and one death.