Influenza like Illness (ILI) Outbreak Situational Report #07

Friday, December 19, 2025, /// DYCA PIO

Yap FM - On Monday, December 8, 2025, Yap EpiNet declared an outbreak of influenza-like-illnesses due to the increase in ILI incidences reported in the EpiWeek 49 report. An unusual increase in ILI was detected in the outer islands, namely Woleai Atoll, Lamotrek and Elato, through ongoing

monitoring by surveillance following the diarrheal outbreak. On December 07, 2025 OPD Main Hospital encountered a total of 49 ILI cases, and continued to the day of the ILI outbreak declaration by EpiNet. Influenza Like Illness is defined as a sudden onset of fever (either subjective or measured) along with cough and/or sore throat. The sentinel sites that have reported ILI cases so far are OPD Yap Mainland Hospital, Satawal Dispensary, Elato Dispensary, Lamotrek Dispensary, Marbaa CHC, and Gagil CHC.

As of today, December 18, 2025, OPD Main Hospital, Gagil and Nimgil CHC Sites have reported 19 new cases, bringing the total to 478 cases reported since November 16, 2025.

The individuals encountered were presented with symptoms such as fever, cough, and runny nose, with some having additional symptoms such as sore throat, headache, body aches, and chills. The majority of these cases were reported at the OPD Main

Hospital and the CHCs making Yap mainland recently the most affected area.

Lab results remain on a cumulative total of 58 positive cases of Influenza A, two of them also testing positive for Influenza A (H3) and three additional cases confirmed for Respiratory Syncytial Virus (RSV).

A total of 10 Sentinel Sites have reported cases of Influenza as follows: Yap Hospital, Elato Dispensary, Lamotrek Dispensary, Satawal Dispensary, Marbaa CHC, Rumung/Maap CHC, Nimgil CHC, Gagil CHC, Tomil CHC and Ulithi Health Center.

Following the Influenza Outbreak Declaration in Yap State by Yap EpiNet, some of the Outer Island Dispensaries reporting ILI encounters have not submitted details on the reported cases and therefore these cases were not reflected in this report.

( For more information, please contact the Department of Health Services at 350-2110)