TABLE 1

Distribution of serum samples, number of children evaluated, and number of time points when at least one symptomatic respiratory infection was reported by parents

Age stratum (yr)No. of samplesa (%) (n = 1,024)No. of children (%) (n = 50)No. of time points (%) (n = 586)
1st124 (12.1)48 (96)83 (14.2)
2nd154 (15.0)50 (100)105 (17.9)
3rd90 (8.8)50 (100)60 (10.2)
4th95 (9.3)50 (100)57 (9.7)
5th94 (9.2)50 (100)60 (10.2)
6th95 (9.3)49 (98)63 (10.8)
7th85 (8.3)47 (94)49 (8.4)
8th89 (8.7)49 (98)46 (7.9)
9th88 (8.6)48 (96)33 (5.6)
10th52 (5.1)32 (64)17 (2.9)
11th34 (3.3)22 (44)6 (1)
12th19 (1.8)11 (22)6 (1)
13th5 (0.5)4 (8)1 (0.2)
  • a Some children had >1 serum sample analyzed in each age stratum.