Influenza B is a virus that causes influenza in humans. Symptoms and complications of influenza B can vary depending on the level of infection and damage to each person's immune system. Below is some basic information about symptoms and complications of influenza B:
Symptoms of influenza B:
1. Flu symptoms: Flu B often causes similar symptoms to flu A. Symptoms often appear suddenly and can include fever, cold, muscle and bone pain, fatigue, headache, congestion nose, cough and sore throat. This symptom usually lasts one to two weeks.
2. Special symptoms in children: Children may experience symptoms such as vomiting, diarrhea, nausea and difficulty swallowing.
Complications of influenza B:
1. Pneumonia: One of the serious complications of influenza B is pneumonia. Pneumonia can cause difficulty breathing, dry cough, chest pain and can cause life-threatening complications.
2. Upper respiratory tract complications: Influenza B can cause sinusitis, otitis media, pharyngitis and laryngitis, causing difficulty breathing, sore throat and noise when breathing.
3. Gastrointestinal complications: Some people may experience gastrointestinal complications such as gastritis and enteritis.
4. Neurological complications: Some cases of influenza B can cause neurological complications, including encephalitis and meningitis. These are serious complications and can cause symptoms such as severe headaches, loss of sensation, seizures, loss of consciousness, and even death.
5. Cardiovascular complications: Some people may experience cardiovascular complications, such as myocarditis and pericarditis.
6. Fetal complications: If a pregnant woman contracts influenza B, there is a high risk of the fetus being in danger, such as stillbirth and miscarriage.
Note that not all cases of influenza B experience these complications. Most cases of influenza B are self-limited and do not cause serious complications. However, the above complications can occur, especially in the elderly, children, pregnant women and people with weakened immune systems.
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