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Volume 10, Number 8—August 2004

Letter

Estimating SARS Incubation Period

Tze-wai Wong*Comments to Author  and Wilson Tam*
Author affiliations: *The Chinese University of Hong Kong, Hong Kong

Main Article

Table

Expected frequency distribution of incubation period for SARS patient with multiple contacts

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
Ca1 0 1/11 1/11 1/11 1/11 1/11 1/11 1/11 1/11 1/11 1/11 1/11 0 0 0 0 0 0
Ca2 1/4 1/4 1/4 1/4 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Ca3 1/2 0 0 1/2 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Ca4 1/11 1/11 1/11 1/11 1/11 1/11 1/11 1/11 1/11 1/11 1/11 0 0 0 0 0 0 0
Ca5 1/14 1/14 1/14 1/14 1/14 1/14 1/14 1/14 1/14 1/14 1/14 1/14 1/14 1/14 0 0 0 0
Ca7 0 0 1/2 0 0 0 0 0 0 1/2 0 0 0 0 0 0 0 0
Ca8 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Ca10 1/6 1/6 1/6 1/6 1/6 1/6 0 0 0 0 0 0 0 0 0 0 0 0
HK2 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
HK3 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
HK4 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0
HK5 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
HK6 1/6 1/6 1/6 1/6 1/6 1/6 1/6 0 0 0 0 0 0 0 0 0 0 0
HK7 0 0 0 0 1/7 1/7 1/7 1/7 1/7 1/7 1/7 0 0 0 0 0 0 0
HK8 0 0 0 0 1/7 1/7 1/7 1/7 1/7 1/7 1/7 0 0 0 0 0 0 0
HK9 1/5 1/5 1/5 1/5 1/5 0 0 0 0 0 0 0 0 0 0 0 0 0
HK10 0 1/6 1/6 1/6 1/6 1/6 1/6 0 0 0 0 0 0 0 0 0 0 0
US1 0 0 0 0 0 1/7 0 0 0 0 0 0 1/7 1/7 1/7 1/7 1/7 1/7
US2 0 0 0 0 0 0 1/6 1/6 1/6 1/6 1/6 1/6 0 0 0 0 0 0
Tot. exp. freq. 1.45 4.40 2.70 1.70 1.24 2.18 0.87 0.71 0.71 1.21 0.71 0.33 0.21 0.21 0.14 0.14 0.14 0.14

aCa, Canada; HK, Hong Kong; US, United States

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