How to Determine if It's Influenza A or Influenza B
Disease description:
I've been having a runny nose for the past few days, and I don't know why. I heard about influenza A and B, and I just want to know how to determine whether my illness is influenza A or B.
Doctor's answer (1)
Dr. Ren Yi
Influenza A is short for Type A influenza, and Influenza B is short for Type B influenza. Distinguishing between Type A and Type B influenza mainly relies on laboratory tests, including rapid antigen testing and nucleic acid testing. These testing methods can accurately identify the virus type and provide a basis for targeted treatment.
Type A influenza typically presents with high fever, reaching above 39°C, and lasts for a longer duration. In contrast, fever caused by Type B influenza is relatively milder, generally around 38°C, and lasts for a shorter period. Patients with Type A influenza often experience significant body aches and fatigue, which worsen with activity. Patients with Type B influenza experience less severe muscle pain and less pronounced fatigue.
Type A influenza progresses rapidly, with symptoms worsening quickly and possible complications. The progression of Type B influenza is relatively slower, with symptoms gradually worsening and a lower incidence of complications. Both Type A and Type B influenza exhibit certain seasonal patterns. Generally, Type A influenza is more prevalent in winter but can also occur in other seasons. Type B influenza usually spreads during winter and spring.
In daily life, it is recommended to wear masks, wash hands frequently, and maintain good personal hygiene habits.
