Table 1 Pearson association between Baidu search terms and ILI% in Northern and Southern mainland China from 2018–2021

Influenza Name

 H1N1

10197 ± 7220

.545^**

.547^**

.547^**

.548^**

.551^**

14509 ± 9684

.256^**

.261^**

.264^**

.270^**

.276^**

 H1N1 pdm2009 (甲流)

12346 ± 13810

.783^**

.787^**

.790^**

.791^**

.793^**

15764 ± 13720

.701^**

.711^**

.721^**

.729^**

.734^**

 Liu xing xing gan mao (流行性感冒)

16987 ± 6280

.471^**

.465^**

.456^**

.448^**

.453^**

14091 ± 6738

.003

.006

.006

.007

.009

 Influenza (流感))

25118 ± 18581

.851^**

.849^**

.844^**

.839^**

.840^**

36780 ± 24700

.704**

.700**

.693**

.680**

.678**

Influenza Therapy

 Compound amantadine tablet (感康)

21970 ± 5135

.528^**

.523^**

.517^**

.515^**

.518^**

30114 ± 18819

-.028

-.023

-.018

-.012

-.005

 Anti-cold drug (感冒药)

17535 ± 3082

.528^**

.513^**

.497^**

.482^**

.473^**

24768 ± 11736

-.030

-.027

-.026

-.025

-.022

 Ganmao Qingre Granules (感冒清热颗粒)

13625 ± 5285

.335^**

.301^**

.270^**

.244^**

.222^**

18993 ± 12243

.005

.007

.008

.011

.014

 What medicine to take for cold (感冒吃什么药)

16072 ± 10915

.371^**

.380^**

.388^**

.397^**

.405^**

16347 ± 10314

.296^**

.301^**

.305^**

.315^**

.322^**

 Tamiflu (达菲)

14259 ± 8581

.803^**

.794^**

.812^**

.820^**

.816^**

14047 ± 9661

.746^**

.741^**

.731^**

.714^**

.703^**

 Oseltamivir (奥司他韦)

27988 ± 30559

.833^**

.827^**

.832^**

.839^**

.836^**

30232 ± 22107

.821^**

.822^**

.816^**

.805^**

.798^**

 Ostavir granules (奥司他韦颗粒)

10989 ± 10661

.644^**

.635^**

.625^**

.616^**

.605^**

9341 ± 7248

.623^**

.623^**

.609^**

.582^**

.564^**

 White and black granules (白加黑)

13188 ± 2010

.602^**

.586^**

.570^**

.560^**

.554^**

14552 ± 3897

.263^**

.258^**

.252^**

.243^**

.240^**

 Tylenol (泰诺)

13092 ± 2185

.726^**

.714^**

.703^**

.693^**

.687^**

24620 ± 9757

.143^*

.142^*

.141^*

.136

.136

Influenza Symptom

 Fever (发热)

11614 ± 2776

.510^**

.517^**

.524^**

.530^**

.538^**

17681 ± 7523

.054

.061

.068

.078

.087

 Heat (发烧)

24191 ± 7089

.862^**

.859^**

.857^**

.855^**

.852^**

36299 ± 15463

.305^**

.300^**

.295^**

.287^**

.284^**

 Pneumonia (肺炎)

75549 ± 187776

.515^**

.527^**

.538^**

.548^**

.556^**

108203 ± 203220

.342^**

.351^**

.360^**

.375^**

.385^**

 Wind chill Cold symptoms (风寒感冒症状)

11218 ± 5420

.166^*

.175^*

.182^**

.191^**

.197^**

11665 ± 3675

.076

.086

.096

.111

.122

 Cold and cough (感冒咳嗽)

11426 ± 4791

.487^**

.470^**

.444^**

.419^**

.398^**

17292 ± 7640

.256^**

.252^**

.235^**

.194^**

.165^*

 Cold symptoms (感冒症状)

9713 ± 1947

.504^**

.512^**

.517^**

.516^**

.519^**

14226 ± 6151

-.005

.003

.009

.016

.021

 High fever (高烧)

8245 ± 1639

.819^**

.811^**

.804^**

.799^**

.794^**

1642 ± 4097

.117

.120

.121

.118

.120

 Catch cold (感冒)

29513 ± 7345

.623^**

.609^**

.597^**

.587^**

.584^**

48640 ± 27627

.051

.051

.052

.051

.054

 Cough (咳嗽)

34807 ± 8972

.703^**

.692^**

.682^**

.673^**

.668^**

56864 ± 32017

.104

.104

.105

.104

.105

 Sore throat (喉咙痛)

13635 ± 3920

.394^**

.368^**

.345^**

.324^**

.305^**

36971 ± 12336

.333^**

.325^**

.316^**

.305^**

.297^**

 Symptoms of influenza A (甲型流感症状)

5027 ± 5543

.786^**

.786^**

.784^**

.782^**

.781^**

6132 ± 5520

.713^**

.718^**

.721^**

.722^**

.721^**

 Influenza symptoms (流感症状)

12970 ± 13613

.847^**

.844^**

.838^**

.837^**

.833^**

20076 ± 20104

.807^**

.804^**

.797^**

.785^**

.777^**

 Runny nose (流鼻涕)

7941 ± 4409

.108

.133

.156^*

.179^**

.200^**

12986 ± 9310

-.052

-.039

-.024

-.004

.013

 Headache (头痛)

15236 ± 1607

-.115

-.110

-.103

-.102

-.095

28202 ± 11522

-.184^**

-.178^*

-.171^*

-.165^*

-.159^*

 Pharyngalgia (咽痛)

5501 ± 1380

.420^**

.428^**

.433^**

.435^**

.442^**

9190 ± 4061

-.005

.001

.006

.012

.019

Influenza Prevention

 Mask (口罩)

23254 ± 33162

.422^**

.433^**

.443^**

.451^**

.458^**

35128 ± 48636

.228^**

.236^**

.244^**

.257^**

.267^**

 Surgical mask (医用外科口罩)

8882 ± 14,069

.423^**

.434^**

.443^**

.452^**

.459^**

13252 ± 18928

.278^**

.286^**

.294^**

.306^**

.315^**