Influenza (commonly referred to as the flu) is an acute respiratory infectious disease caused by the influenza virus. Unlike the common cold, influenza is highly contagious and is characterized primarily by systemic symptoms. Elderly individuals, children under the age of 5, patients with chronic diseases, pregnant women, and individuals with compromised immune systems are all considered high-risk populations for severe influenza [1]. A study based on national influenza surveillance and cause-of-death surveillance data revealed that, on average, there are 88,000 excess deaths related to influenza-associated respiratory diseases annually across China [2]. The total economic burden on outpatient patients with influenza ranges from RMB 801 to RMB 1,320, while the total economic burden on hospitalized influenza patients ranges from RMB 9,832 to RMB 23,833 [1]. In the face of the significant challenge posed by influenza, influenza vaccination is currently recognized worldwide as the most cost-effective and effective means of preventing influenza [1].