STANISLAUS COUNTY — Stanislaus County public health officials are urging residents to be aware of mpox symptoms and prevention measures after four recent cases of Clade I mpox were reported in the county.
According to the Stanislaus County Health Services Agency, two of the cases have been confirmed as Clade I by the California Department of Public Health, while confirmatory testing is underway for the remaining two cases.
Health officials said three of the individuals reported no recent international travel. The travel history of the fourth individual remains under investigation.
Historically, Clade I mpox cases in the United States have been linked to international travel. However, public health officials said more cases have been identified among people without recent international travel since August 2026, suggesting the virus may now be spreading within U.S. communities.
"While we have identified four cases in our county, we want residents to know that the risk to the general public remains low," said Dr. Thea Papasozomenos, Stanislaus County public health officer.
"Being aware of the symptoms, getting vaccinated if at risk of exposure to mpox, and seeking medical care when needed are important ways to protect yourself and prevent the spread of mpox," Papasozomenos said.
Mpox is a viral infection that can cause a painful or itchy rash and flu-like symptoms. Symptoms can include a rash or sores that resemble pimples or blisters, fever, chills, swollen lymph nodes, headaches, muscle aches and fatigue. Some people may develop only a few sores without other symptoms.
Public health officials said the virus spreads primarily through close personal contact with an infected person, including skin-to-skin contact, intimate or sexual contact, contact with infected sores or bodily fluids, or contaminated items such as bedding, towels and clothing. Officials emphasized that mpox does not spread easily through casual contact, such as passing someone in a store or working in the same office.
Most people recover within two to four weeks, although more serious illness can occur.
The JYNNEOS vaccine is recommended for people at increased risk of exposure to mpox. The vaccine is administered in two doses approximately four weeks apart and helps protect against infection and severe illness.
Residents experiencing an unexplained rash or sores are encouraged to contact a healthcare provider about testing. Health officials advise individuals who suspect they have mpox to avoid close physical contact with others, avoid sharing personal items and contact a healthcare provider before seeking in-person care.
The Health Services Agency said it continues to work with the California Department of Public Health and local healthcare partners to monitor mpox activity and help prevent further spread of the virus.
