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Table 6 Characteristics of measles outbreaks in secondary schools

From: Estimating the nationwide transmission risk of measles in US schools and impacts of vaccination and supplemental infection control strategies

School Location [outbreak year] – Type

NO. Students

No Vac. Record

1-Dose Vaccination

2-Dose Vaccination

ARU

ARI-1- Dose

ARI-2- Dose

ARI, General

Susceptible Students

NO. First Gen. Cases

Total NO. Cases

Massachusetts, US [1984] SHS [59]

2098

0.6%

42.3%

57.1%

22.9%

1.7%

0.5%

1.0%

117

5

24

Texas, US [1985] HS [103]

1796

0.6%

87.6%

11.9%

10.0%

4.5%

1.4%

4.1%

99

3

5

Illinois, US [1985] HS [22]

1873

0.3%

71.1%

28.9%

0.0%

4.5%

1.7%

3.7%

100

69

69

New Mexico, US [1987] HS [110]

2012

1.9%

76.5%

21.6%

0.0%

2.8%

1.7%

2.6%

137

24

49

Texas, US [1989] HS [111]

2243

0.0%

95.2%

4.8%

N/A

3.2%

1.9%

3.2%

112

58

71

Honkajoki, Finland [1989] HS [112]

144

63.8%

29.5%

6.7%

22.4%

29.0%a

14.3%a

26.3%a

69

22

25

Gwynedd, North Wales [1991] SHS [113]

723

38.5%

NR

NR

33.1%

NR

NR

1.0%

140

12

45

Alaska, US [1996] HS [61, 105]

127

<  1%

45.0%

44.0%

NR

NR

NR

<  3.94%

7

3

5

Alaska, US [1996] HS I [114]

2192

0.0%

48.8%

50.4%

0.0%

1.5%

0.0%

0.7%

110

16

17

Alaska, US [1996] HS II [114]

1486

0.5%

53.9%

45.5%

0.0%

0.1%

0.3%

0.1%

81

NR

2

Pennsylvania, US [2003] SBS [115]

663

0.5%

3.9%

94.9%

66.7%

0.0%

1.0%

0.9%

36

5

8

Quebec, Canada [2011] HS [116]

1306

4.7%

9.0%

85.5%

82.0%

4.6%

3.7%

4.7%

123

10

110

  1. HS High School; SHS Senior High School; SBS Senior Boarding School; NR Not ffig Reported.
  2. a Only extreme measles outbreak where ARIs were larger than assumed measles susceptibility rate of students between 14 and 18 years old with either 1-dose or 2-dose vaccination (i.e. 5%)