Table 5 Proportions of infection or clinical morbidity among household contacts of children and adults among three TIV vaccination status groups during the three consecutive influenza seasons
From: Geographical heterogeneity and influenza infection within households
| Â | 1st Year | Â | 2nd Year | Â | 3rd Year | Â | |||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Children, Number (proportion) | TIV(-) | TIV(+) | P | TIV(-) | Partial TIV | TIV(+) | P | TIV(-) | Partial TIV | TIV(+) | P |
|  | N = 37 | N = 43 |  | N = 72 | N = 38 | N = 14 |  | N = 31 | N = 32 | N = 74 |  |
4-fold increase | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â |
  H1N1 | 6(0.16) | 6(0.14) |  | 29(0.40) | 10(0.26) | 3(0.21) |  | 13(0.42) | 12(0.38) | 31(0.42) |  |
  H3N2 | 4(0.11) | 14(0.33) |  | 30(0.42) | 17(0.45) | 4(0.29) |  | 11(0.35) | 6(0.19) | 26(0.35) |  |
  B | 4(0.11) | 3(0.07) |  | 35(0.49) | 17(0.45) | 7(0.50) |  | 6(0.19) | 14(0.44) | 18(0.24) |  |
  pH1N1 | - | - |  | 55(0.76) | 27(0.71) | 13(0.93) |  | - | - | - |  |
Any 4-fold increase | 14(0.38) | 20(0.47) | Â | 44(0.61) | 23(0.61) | 7(0.50) | Â | 22(0.71) | 21(0.66) | 52(0.70) | Â |
Symptoms | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â |
  Any | 17(0.46) | 29(0.67) |  | 36(0.50) | 22(0.58) | 9(0.64) |  | 19(0.61) | 13(0.41) | 37(0.50) |  |
  Fever | 5(0.14) | 14(0.33) |  | 7(0.10) | 1(0.03) | 1(0.07) |  | 3(0.10) | 6(0.19) | 9(0.12) |  |
  Fever plus any two symptoms | 3(0.08) | 10(0.23) |  | 4(0.06) | 0(0.00) | 0(0.00) |  | 1(0.03) | 4(0.13) | 7(0.09) |  |
Any 4-fold increase plus any symptoms | 5(0.14) | 15(0.35) | * | 24(0.33) | 13(0.34) | 5(0.36) | Â | 27(0.87) | 24(0.75) | 62(0.84) | Â |
Adults, Number (proportion) | TIV(-) | TIV(+) | P | TIV(-) | Partial TIV | TIV(+) | P | TIV(-) | Partial TIV | TIV(+) | P |
|  | N = 98 | N = 116 |  | N = 222 | N = 111 | N = 109 |  | N = 77 | N = 74 | N = 249 |  |
Any 4-fold increase | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â |
  H1N1 | 0(0.00) | 2(0.02) |  | 70(0.32) | 46(0.41) | 41(0.38) |  | 10(0.13) | 19(0.26) | 60(0.24) |  |
  H3N2 | 9(0.09) | 17(0.15) |  | 57(0.26) | 38(0.34) | 41(0.38) | * | 3(0.04) | 0(0.00) | 6(0.02) |  |
  B | 5(0.05) | 3(0.03) |  | 70(0.32) | 45(0.41) | 38(0.35) |  | 4(0.05) | 6(0.08) | 18(0.07) |  |
  pH1N1 | - | - |  | 109(0.49) | 57(0.51) | 55(0.50) |  | - | - | - |  |
Any 4-fold increase | 14(0.14) | 20(0.17) | Â | 135(0.61) | 74(0.67) | 75(0.69) | Â | 11(0.14) | 20(0.27) | 64(0.26) | Â |
Symptoms | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â |
  Any | 43(0.44) | 52(0.45) |  | 55(0.25) | 34(0.31) | 39(0.36) | * | 30(0.39) | 31(0.42) | 105(0.42) |  |
  Fever | 9(0.09) | 5(0.04) |  | 1(0.00) | 4(0.04) | 2(0.02) |  | 2(0.03) | 1(0.01) | 7(0.03) |  |
  Fever plus any two symptoms | 0(0.00) | 1(0.01) |  | 0(0.00) | 0(0.00) | 0(0.00) |  | 1(0.01) | 0(0.00) | 5(0.02) |  |
Any 4-fold increase plus any symptoms | 7(0.07) | 7(0.06) | Â | 39(0.18) | 24(0.22) | 24(0.22) | Â | 38(0.49) | 42(0.57) | 131(0.53) | Â |