Staff Chula Vista Today
SAN DIEGO — County health officials are warning of a recent rise in hepatitis A and mpox cases (formerly known as monkeypox) and are urging vaccination, particularly among people at higher risk of infection.
The county reported three unrelated hepatitis A cases in individuals living in the same household who had not traveled abroad. None were vaccinated, and two required hospitalization. So far in 2025, 10 hepatitis A cases have been confirmed in the region.
Hepatitis A is a viral infection that affects the liver and can spread through contaminated food or water, as well as through sexual or close physical contact. Higher-risk groups include people experiencing homelessness, those who use illicit drugs, men who have sex with men, and international travelers.
“The hepatitis A vaccine can prevent illness even up to 14 days after exposure,” said public health officer Sayone Thihalolipavan, MD, MPH, emphasizing that immunization is recommended starting at 12 months of age. The vaccine is available at public health centers, pharmacies, and medical offices.
Symptoms can include fever, fatigue, diarrhea, nausea, dark urine, pale stools, and yellowing of the skin or eyes. The illness can last from several weeks to a few months.
At the same time, authorities reported 14 new mpox cases over the past three months — more than double the number detected at the beginning of the year. Most recent infections have occurred among men who have sex with men, though anyone can contract the virus through close physical contact.
The JYNNEOS vaccine offers protection against mpox. Officials recommend two doses, given 28 days apart. If more time has passed since the first dose, the second should be administered as soon as possible.
To reduce the risk of infection, health officials advise avoiding skin-to-skin contact with people who have rashes or lesions, not sharing personal items, and washing hands frequently. Anyone exposed to the virus should monitor for symptoms for 21 days and seek medical care; vaccination is available for up to 14 days after exposure.
Hepatitis A and mpox vaccines are available at no cost at San Diego County sexual health clinics, located in the North Coastal, Central, and South public health centers. Those without a medical provider can call 2-1-1 for more information.