The Los Angeles County Department of Public Health has declared a community-wide hepatitis A outbreak following a sharp rise in cases and increased virus levels detected in wastewater. Since 2024, 165 cases have been confirmed, three times the total reported in 2023. Most of the 29 cases identified in 2025 have occurred in individuals without known risk factors such as homelessness or travel, signaling broader community transmission.1
Although the overall risk to the public is currently low, health officials are urging residents to get vaccinated and practice good hygiene. In the press release, Muntu Davis, MD, MPH, LA County Health Officer, stressed that the hepatitis A vaccine is safe, effective, and essential for long-term protection. Regular handwashing is also strongly recommended, especially before eating or preparing food and after using the bathroom.1
Public Health is coordinating with healthcare providers and outreach organizations to educate the public, monitor new cases, and offer vaccinations. Mobile vaccine units continue to serve people experiencing homelessness, while residents with insurance can access the vaccine through their providers or participating pharmacies. The infection, which affects the liver and can range from mild to severe, is preventable through vaccination and proper sanitation.1
What You Need To Know
LA County has reported 165 hepatitis A cases since 2024, triple the 2023 total, with recent infections occurring in people without known risk factors, indicating wider community transmission.
Public health officials emphasize that the hepatitis A vaccine is safe and effective and that good handwashing practices are essential to preventing infection.
The Department of Public Health is working with providers and outreach teams to offer vaccinations, monitor new cases, and educate the public, especially in vulnerable populations.
Hepatitis A: What You Need to Know
Hepatitis A is a highly contagious liver infection caused by the hepatitis A virus (HAV). It typically results in a short-term illness, with symptoms such as fatigue, stomach pain, nausea, jaundice (yellowing of the skin or eyes), and dark urine. While most people recover fully without lasting liver damage, in rare cases, especially among older adults or those with existing liver conditions, it can lead to liver failure and even death.2
The virus spreads primarily through close personal contact or by consuming contaminated food or water. Many infected individuals, especially children, may show no symptoms but can still transmit the virus. Symptoms generally appear 2–7 weeks after exposure and can last up to six months in some cases.2
The best way to prevent hepatitis A is through vaccination, which is safe, effective, and long-lasting. Good hand hygiene is also essential in reducing spread. Anyone not previously vaccinated or exposed to HAV is at risk, particularly those experiencing homelessness, using drugs, or in certain high-risk groups.2
There is no specific antiviral treatment for hepatitis A. Most people recover with rest, hydration, and supportive care. Once someone recovers, they are immune for life.2
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