Table 1 Summary of associations between clinical characteristic and viral infectious

Male

348(57.33 %)

123(56.68 %)

Female

259(42.67 %)

94(43.32 %)

≤2 years

125(20.59 %)

52(23.96 %)

3 ~ 4

118(19.44 %)

57(26.27 %)

5 ~ 15

124(20.43 %)

50(23.05 %)

16 ~ 59

110(18.12 %)

29(13.36 %)

≥60 years

130(21.42 %)

29(13.36 %)

chronic lung disease

57(9.39 %)

14(6.45 %)

coronary artery heart disease

123(20.26 %)

32(14.75 %)

Metabolic

48(7.91 %)

15(6.91 %)

incubate the influenza vaccine last year

31(5.11 %)

18(8.29 %)

fever(<38)

21(3.46 %)

8(3.69 %)

fever (≥38)

586(96.54 %)

209(96.31 %)

sore throat

290(47.78 %)

88(40.55 %)

Cough

475(78.25 %)

175(80.65 %)

difficulty breathing

173(28.50 %)

55(25.34 %)

lung auscultation

357(58.81 %)

119(54.84 %)

abnormal X-ray

270(44.48 %)

83(38.25 %)