Table 1 Weekly reported, expected, undetected imported cases, and reporting rate.

From: A measure to estimate the risk of imported COVID-19 cases and its application for evaluating travel-related control measures

Week number (Date)

Reported imported casesa

Expected imported cases (95% CI)

Undetected imported casesb (95% CI)

Reporting rate (%)c (95% CI)

1 (2020-01-01–2020-01-05)

0

4.3 (0–12)

4.3 (0–12)

0 (0–100)

2 (2020-01-06–2020-01-12)

0

4.4 (0–11)

4.4 (0–11)

0 (0–100)

3 (2020-01-13–2020-01-19)

0

4.5 (1–12)

4.5 (1–12)

0 (0–0)

4 (2020-01-20–2020-01-26)

1

4.9 (1–11)

3.9 (0–10)

20.3 (9.1–100)

5 (2020-01-27–2020-02-02)

3

6.5 (1–12)

3.5 (0–9)

46.0 (25.0–100)

6 (2020-02-03–2020-02-09)

3

6.0 (1–11)

3.0 (0–8)

50.4 (27.3–100)

7 (2020-02-10–2020-02-16)

0

5.1 (1–11)

5.1 (1–11)

0 (0–0)

8 (2020-02-17–2020-02-23)

1

4.7 (1–12)

3.7 (0–11)

21.3 (8.3–100)

9 (2020-02-24–2020-03-01)

4

5.1 (1–10)

1.1 (0–6)

78.0 (40.0–100)

10 (2020-03-02–2020-03-08)

0

5.8 (1–11)

5.8 (1–11)

0 (0–0)

11 (2020-03-09–2020-03-15)

5

7.4 (1–15)

2.4 (0–10)

68.0 (33.3–100)

12 (2020-03-16–2020-03-22)

22

11.5 (1–60)

0.0 (0–38)

100 (36.7–100)

13 (2020-03-23–2020-03-29)

64

13.2 (0–92)

0.0 (0–28)

100 (69.6–100)

Total/Averaged

103

83.3 (10–280)

41.6 (3–177)

37.2 (19.2–76.9)

  1. aIndicates cases from the selected 23 countries.
  2. bExpected imported cases – reported imported cases.
  3. cExpected imported cases/reported imported cases * 100.
  4. dThe total is provided for the reported, expected, undetected imported cases, and the average is provided for the reporting rate.
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