Influenza Update: Thailand Reports Rising Cases and Deaths in 2026

Thailand is currently experiencing an increase in influenza cases, with a significant number of infections and a concerning number of fatalities reported in the first months of 2026. Public health officials are urging vigilance, particularly among vulnerable populations.

Influenza Cases in Thailand – 2026

Between January 1st and March 9th, 2026, Thailand recorded a cumulative total of 137,276 influenza cases, representing an illness rate of 211.48 per 100,000 people. The Department of Disease Control (DDC) has issued warnings about the upward trend, emphasizing the need for preventative measures.

Age Groups Most Affected

The highest infection rates are currently observed in the following age groups:

• 5-9 years: 753.20 per 100,000 (26,806 cases)
• 0-4 years: 596.20 per 100,000 (16,992 cases)
• 10-14 years: 534.20 per 100,000 (20,812 cases)

Fatalities and Risk Factors

As of March 9th, 2026, eight deaths related to influenza have been reported in Thailand. Most fatalities have occurred among individuals aged 60 and above, particularly those with underlying health conditions such as kidney disease, immunodeficiency, or cancer. A significant proportion of those who died had not received an influenza vaccination.

Geographic Distribution

The provinces with the highest illness rates are currently:

• Phayao
• Lampang
• Phitsanulok
• Chiang Mai
• Ubon Ratchathani

Current Trends and Outlook

While case numbers began to decline last week, they remain above the five-year average, indicating continued circulation of the influenza virus within communities. Dr. Montien Kanasawat of the DDC notes that influenza cases typically rise from the beginning of the year, with outbreaks intensifying in the middle of the year.

Prevention and Treatment

The Centers for Disease Control and Prevention (CDC) recommends several strategies to reduce the risk of seasonal flu, including vaccination. Antiviral drugs are likewise available as a treatment option if you become ill.

Influenza vs. COVID-19

It’s important to be aware of the similarities and differences between influenza and COVID-19. The CDC provides information on prevention and treatment for both viruses.

Resources

• Centers for Disease Control and Prevention (CDC) – Influenza
• Department of Disease Control, Ministry of Public Health, Thailand