Table 1. Search terms primarily selected in this study.

Search term type	Primarily selected search terms
Commonly used words	流感(influenza, X1)、甲流(type A influenza, X2)、H1N1(X3)、H7N9(X4)、H5N1(X5)
Symptom words	感冒(have a cold, X6)、发热(fever, X7)、呼吸道感染(respiratory tract infection, X8)、发烧(fever, X9)、高烧(high fever, X10)、鼻塞(nasal congestion, X11)、咳嗽(cough, X12)、气管炎(tracheitis, X13)、流鼻涕(rhinorrhea, X14)、咽炎(pharyngitis, X15)、咽喉痛(sore throat, X16)、咽喉炎(pharyngolaryngitis, X17)
Therapeutic words	泰诺(Tylenol, X18)、康泰克(Contac, X19)、感康(compound amantadine, X20)、白加黑(Baijiahei capsule, X21)、快克(Kuaike, X22)、达菲(Tamiflu, X23)、阿莫西林(amoxicillin, X24)、板蓝根(banlangen, X25)

Note: Our primarily selected search terms in Table 1 are labeled in this format “Chinese name (English name, variable notation)”.