What are common Influenza B symptoms to watch for?

Common Influenza B symptoms include sudden fever, cough, sore throat, fatigue, headache, body aches, and occasionally nausea. Most patients recover within a week, but cough and tiredness can linger. Seek medical advice for high fever, breathing difficulty, dehydration signs, or if symptoms worsen after initial improvement.

How does the Japan flu surge affect pharmacies and OTC demand?

Pharmacies typically see higher sales of antipyretics, cough and cold remedies, lozenges, thermometers, oral rehydration, masks, and test kits. When Influenza B symptoms linger, repeat purchases rise. Watch weekend sell-out rates and online stock notices for early signals of tight supply in high-incidence prefectures.

Why are so many schools closing classes now?

Class closures aim to cut transmission when multiple students are sick in the same class or grade. With Influenza B symptoms common and contagious, administrators pause in-person learning to protect students and staff. Boards may offer makeup exam dates or remote study options until attendance can safely resume.

What indicators should investors monitor next?

Focus on weekly clinic reports, pharmacy inventory turnover, OTC basket sizes, and municipal guidance updates. Rising visits for Influenza B symptoms, stable JPY pricing with faster sell-through, and reports of regional spot shortages can signal sustained demand. Also track absenteeism notices from retailers and public transport operators.

Law and Government

February 4: Japan Influenza B Rebound Spurs OTC Demand, School Closures

ByHuzaifa Zahoor February 3, 2026February 3, 2026

Influenza B symptoms are back in focus as Japan faces a fresh in-season wave. The Japan flu surge has pushed Tokyo above the advisory threshold, while Kagoshima records the highest levels nationwide. Over 2,200 schools report class closures, and exam schedules face disruption. We expect stronger OTC medicine demand at pharmacies and tighter prevention guidance. For investors, near-term sales in antivirals and self-care products may rise, while service sectors face absenteeism risk. We map the data, the drivers, and practical signals to watch this week.