Table 3 The secondary attack rates in twenty-two clusters of COVID-19 in Ningbo City, Zhejiang Province, China.
Outbreak ID | Classification of infection source | Basic information of the infection source | Number of close contacts | Number of secondary cases | SAR (%) | ||
|---|---|---|---|---|---|---|---|
Sex | Age (years) | Symptomatic | Asymptomatic | ||||
A | Asymptomatic | Male | 24 | 48 | 2 | 1 | 6.25 |
B | Asymptomatic | Male | 12 | 41 | 1 | 1 | 4.88 |
C | Symptomatic | Female | 64 | 1347 | 66 | 15 | 6.01 |
D | Symptomatic | Male | 54 | 128 | 3 | 1 | 3.13 |
E | Symptomatic | Male | 31 | 44 | 1 | 0 | 2.27 |
F | Symptomatic | Male | 37 | 11 | 2 | 0 | 18.18 |
G | Symptomatic | Female | 49 | 6 | 1 | 0 | 16.67 |
H | Symptomatic | Male | 49 | 87 | 1 | 2 | 3.45 |
I | Symptomatic | Female | 54 | 86 | 4 | 0 | 4.65 |
J | Symptomatic | Female | 58 | 3 | 1 | 1 | 66.67 |
K | Symptomatic | Male | 45 | 27 | 4 | 0 | 14.81 |
L | Symptomatic | Male | 29 | 17 | 3 | 0 | 17.65 |
M | Symptomatic | Male | 62 | 104 | 5 | 0 | 4.81 |
N | Symptomatic | Female | 66 | 101 | 7 | 0 | 6.93 |
O | Symptomatic | Male | 50 | 38 | 6 | 1 | 18.42 |
P | Symptomatic | Male | 56 | 88 | 1 | 1 | 2.27 |
Q | Symptomatic | Female | 71 | 8 | 1 | 0 | 12.50 |
R | Symptomatic | Female | 35 | 22 | 1 | 0 | 4.55 |
S | Symptomatic | Female | 38 | 36 | 0 | 2 | 5.56 |
T | Symptomatic | Female | 63 | 4 | 2 | 0 | 50.00 |
U | Symptomatic | Female | 29 | 41 | 5 | 2 | 17.07 |
V | Symptomatic | Female | 57 | 191 | 1 | 0 | 0.52 |
