Table 1. Characteristics of pertussis cases in an Amish community outbreak, Kent County, Delaware, January 2018 – October 2018.
Characteristic |
Cases
n(%) |
Primary/Co-Primary cases
n(%) |
Secondary/Second Primary cases
n(%) |
---|---|---|---|
Sex | |||
Male | 88 (49) | 45 (25) | 43 (24) |
Female | 93 (51) | 47 (26) | 46 (25) |
Age group (yrs) | |||
<1 | 9 (5) | 5 (3) | 4 (2) |
1-5 | 73 (40) | 41 (23) | 32 (18) |
6-10 | 57 (31) | 29 (16) | 28 (16) |
11-14 | 18 (10) | 9 (5) | 9 (5) |
15-19 | 10 (5.5) | 4 (2) | 6 (3) |
20-29 | 8 (4.4) | 2 (1) | 6 (3) |
>30 | 6 (3.3) | 2 (1) | 4 (2) |
Vaccination status | |||
Vaccinated | 19 (10.5) | 11 (6) | 9 (5) |
Partially vaccinated* | 8 (4.4) | 4 (2) | 3 (1.6) |
Unvaccinated | 154 (85) | 77 (43) | 77 (43) |
* Partially vaccinated is defined as receipt of ≤ 3 doses of vaccine against pertussis.