Full Breakdown
Mpox Cases Confirmed in Nevada and Virus Detected in Hawaii Wastewater: Public Health Response
4/29/2026, 12:13:20 AM
Confirmed Cases in Washoe County, Nevada
Northern Nevada Public Health reported two lab-confirmed mpox cases in Washoe County, the first since October 2022. Patients are under observation and contacts are being traced. Officials say community risk is low but advise high-risk groups—men who have sex with men, those with multiple partners, and occupational exposures—to obtain two-dose JYNNEOS vaccine, available in limited supply through agency’s Family Planning Sexual Health Program.
Clade I Mpox Detected in Oahu Wastewater
The Hawaii Department of Health confirmed a wastewater sample from the Joint Base Pearl Harbor-Hickam plant collected on April 13 tested positive for clade I mpox. Confirmation arrived April 24; a follow-up sample on April 20 was negative. No clinical cases have been reported. Officials say wastewater detection signals vigilance but does not prove community spread, and public-health risk remains low.
Mpox Overview
Mpox, formerly monkeypox, spreads through prolonged skin-to-skin contact, lesion material, or contaminated items such as clothing or bedding. Both clade I and clade II cause mpox, which can present with rash, fever, swollen lymph nodes, and fatigue, and does not transmit through air or casual shared spaces.
Public Health Guidance
Dr. Chad Kingsley noted mpox shares pox family with chickenpox and smallpox, urging rapid contact tracing, testing and vaccination for high-risk groups. Dr. Nancy Diao said Nevada cases remind virus persists locally. Hawaii’s DOH advised travelers to monitor health, seek testing if symptomatic, and consider two-dose JYNNEOS vaccine. Bavarian Nordic’s vaccine lead Melvin Sanicas said Nevada detection has drawn worldwide attention, reinforcing swift action.
Conflicting Reports & Gaps
The wastewater result does not confirm an active infection, and no clinical cases have been reported in Hawaii, leaving community prevalence uncertain. In Nevada, limited vaccine supply and eligibility criteria may exclude exposed individuals. Data on asymptomatic spread and relative impact of clade I versus clade II in the U.S. remain lacking.
Verbatim Quotes
- “The detection in Washoe County is important news,” — Melvin Sanicas, Bavarian Nordic
- “The reason it has pox on it [is] because it’s the same family—so chickenpox, measles, smallpox,” — Dr. Chad Kingsley, Northern Nevada Public Health
- “The presence of clade I mpox virus in wastewater does not confirm a clinical case or community spread,” — Hawaii Department of Health spokesperson
- “While these cases are not unexpected, they are a reminder that mpox is still present in our community,” — Dr. Nancy Diao, Northern Nevada Public Health
Next Steps
Northern Nevada will continue contact tracing and expand vaccination clinics for eligible high-risk residents. Hawaii will maintain routine wastewater surveillance on Oahu and advise the public to seek testing if symptoms appear. Both health departments will issue updates as new data become available.
