What does it mean if someone with influenza B keeps having a low-grade fever?
Disease description:
Hello doctor, I've got influenza B and have been running a persistent low-grade fever, which is really uncomfortable. Could you please explain why influenza B causes a prolonged low fever?
Doctor's answer (1)
Dr. Ma Yan
Persistent low-grade fever in influenza B may be caused by factors such as incomplete clearance of the virus or secondary infections. In patients with influenza B, the virus may not have been fully eliminated from the body, continuously stimulating the immune system and triggering an inflammatory response, leading to prolonged low-grade fever. This condition usually resolves spontaneously within a period after the viral infection is controlled. Secondary bacterial infections may also occur in patients with influenza B, resulting in persistent low-grade fever. Since viral infections can weaken the body's immunity, bacteria may take advantage of this weakened state to invade, causing secondary bacterial infections. Additionally, low-grade fever in influenza B patients may be related to other factors such as psychological stress or unhealthy lifestyle habits.
