Influenza B: What you need to know about symptoms, treatment, and prevention

Symptoms of influenza B

Symptoms of influenza B often resemble a cold, but they usually appear suddenly and are more intense. In Poland, where cold and flu seasons overlap, it's important to know the differences and react quickly. 

Typical symptoms of influenza B include:

• High fever (sometimes above 39°C)
• Persistent cough
• Fatigue and weakness
• Muscle and body pain
• Chills and headaches
• Sore throat and runny nose

Children may experience additional gastrointestinal symptoms such as nausea, vomiting, or diarrhea.

 If your symptoms are severe or do not improve after a few days, consult a specialist or visit your local National Health Fund clinic.

How long does type B flu last?

On average, type B flu lasts 2 to 8 days, but fatigue and cough can persist for several weeks. Most people in Poland recover with rest and adequate hydration, but the course of the illness can vary depending on age and health. You should seek medical attention if:

• Symptoms worsen after 3-4 days
• You have had a high fever for more than 5 days
• You experience chest pain or shortness of breath

Early action can prevent more serious problems, especially in susceptible individuals.

Is influenza A or B worse?

Both types can cause serious illness, but the severity of influenza A or B largely depends on the health of the individual. Influenza A is more likely to cause large epidemics, but influenza B can be just as serious, especially in children.

The misconception that influenza B is "milder" is not entirely true. In some years, type B is the dominant strain circulating in Poland, and its impact on hospitals and clinics is equally significant.

What happens if I test positive for influenza B?

If you or your child tests positive for influenza B in Poland, either through a test at a pharmacy (flu test at a pharmacy in Poland), or in the clinic, don't panic. The first step is isolation to prevent the spread of the virus!

Here's what you should do if the result is positive:

• Stay home and rest for 5–7 days or longer.
• Drink plenty of fluids.
• Use fever-reducing medications (but avoid aspirin in children).
• Consider antiviral medications, especially if prescribed within 48 hours of symptom onset.

 Tamiflu is available by prescription in Poland and can help shorten recovery time if given early.

If you're unsure about taking medication, always consult your doctor. Polish healthcare professionals will advise you based on your age, risk factors, and the severity of your symptoms.