ALERT: The Pan American Health Organization is sounding the alarm on rising flu activity. Seasonal influenza continues to increase across the Americas. As a result, PAHO urges countries to stay alert.

Yesterday, PAHO issued an updated epidemiological alert. This update follows an advisory released on December 4, 2025. At that time, officials warned of an early or intense respiratory season.

Globally, flu activity has risen steadily since October 2025. Most cases involve the A(H3N2) strain. Meanwhile, respiratory syncytial virus, or RSV, is also increasing.

In the Americas, flu positivity remains above 10 percent. Moreover, North and Central America report sustained growth. At the same time, Caribbean levels approach 20 percent. Again, A(H3N2) remains the dominant strain.

Additionally, PAHO reviewed data from several countries. These include the United States, Canada, the United Kingdom, and Spain. The data show an early and rapid flu season. Outpatient visits have increased, especially among children. Furthermore, hospitalizations are rising among older adults.

However, overall severity remains similar to past seasons. Importantly, no excess deaths have been reported so far. Still, some countries now exceed recent flu activity levels. These increases involve flu detection and clinic visits.

In this context, RSV adds further concern. Consequently, health systems may face extra strain. Therefore, PAHO stresses the need for constant monitoring. Early action can reduce wider outbreaks.

“The simultaneous circulation of influenza and RSV is a serious challenge,” said Dr. Marc Rondy. He emphasized vaccination and strong surveillance. These steps help prevent severe illness and hospital crowding.

Meanwhile, studies show flu vaccines remain effective. Vaccination reduces hospitalizations by 30 to 40 percent in adults. In children, effectiveness reaches 75 percent.

Therefore, PAHO urges high vaccination coverage. Priority groups include children and pregnant people. Older adults and people with chronic conditions also face higher risk. Healthcare workers should remain protected as well.

Furthermore, PAHO recommends integrated respiratory surveillance. Countries should track flu, RSV, and COVID-19 together. Weekly reporting to FluNET and FluID remains essential.

In addition, health services should update response plans. These plans should prepare for possible spikes in cases.

Finally, PAHO reminds the public to take simple steps. Get vaccinated when eligible. Wash hands often. Cover coughs and sneezes. Wear masks when sick. Stay home if symptoms appear. Seek medical care early for severe illness.

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