What are common Influenza B symptoms?

Typical Influenza B symptoms include sudden fever near 38°C or higher, sore throat, dry cough, chills, muscle aches, headache, and strong fatigue. Some people develop nasal congestion after day one. Seek care if you have trouble breathing, chest pain, dehydration, or if fever does not improve.

How is Influenza B different from Influenza A?

Influenza A often drives the first big wave, while Influenza B can surge later and affect children more. Symptoms are similar, but B sometimes spreads in schools longer into late winter. Treatment and prevention steps are the same. Testing confirms the type and guides timing for antivirals.

Will there be more school closures in Japan?

Class or grade closures may continue where absenteeism rises, and decisions are made by schools and local boards. Families should check daily notices and school apps. Short closures aim to break clusters. Timing varies by prefecture guidance and real‑time conditions during the Japan influenza surge.

When should I see a doctor for Influenza B?

See a doctor urgently for breathing problems, chest pain, confusion, severe dehydration, or if high fever persists. Babies, older adults, pregnant people, and those with chronic illnesses should call clinics early. Antivirals are most helpful when started soon after symptoms begin, usually within two days.

Law and Government

February 13: Japan Influenza B Surge Hits Warning Level Again

ByDanny Kontos February 13, 2026February 13, 2026

Influenza B symptoms are back in focus as Japan moves above the official warning level again. Multiple regions report sharp increases and class closures, pointing to near‑term disruption for schools and workplaces. We outline what the renewed alert means, how Influenza B symptoms present in adults and children, and what actions reduce spread. For retail investors and managers, we also flag absenteeism risk and planning steps as Japan influenza surge conditions evolve through late winter.