Table 3 Cumulative numbers of deaths associated with COVID-19 in the counterfactual scenarios.

From: Evaluating the COVID-19 vaccination program in Japan, 2021 using the counterfactual reproduction number

Age group (years)

Scenarioa

Estimate (persons)

95% confidence interval

Relative change (%)b

0–9

Early

Late

Elevated

10–19

Early

2

2–2

 − 31

Late

11

10–11

260

Elevated

2

2–3

 − 19

20–29

Early

10

9–11

 − 56

Late

46

44–49

102

Elevated

11

10–12

 − 51

30–39

Early

27

24–29

 − 60

Late

131

124–138

95

Elevated

30

28–33

 − 55

40–49

Early

106

97–115

 − 53

Late

533

504–562

135

Elevated

122

113–131

 − 46

50–59

Early

301

276–326

 − 54

Late

1465

1381–1547

126

Elevated

348

320–376

 − 46

60–69

Early

533

480–587

 − 49

Late

1998

1859–2138

92

Elevated

663

602–727

 − 36

70–79

Early

1445

1296–1601

 − 40

Late

4000

3684–4325

67

Elevated

1700

1532–1877

 − 29

80–89

Early

2135

1874–2410

 − 44

Late

5089

4608–5586

34

Elevated

2444

2156–2748

 − 36

 ≥ 90

Early

717

565–880

 − 61

Late

1831

1558–2119

 − 1

Elevated

829

661–1009

 − 55

Total

Early

5274

4623–5960

 − 48

Late

15,103

13,771–16,474

50

Elevated

6150

5424–6916

 − 39

  1. aEarly: counterfactual scenario of a vaccination program implemented earlier that the actual schedule; Late: counterfactual scenario of a vaccination program implemented later that the actual schedule; Elevated: counterfactual scenario if the program had been implemented faster with higher vaccination coverage among adolescents and people aged 10–59 years.
  2. bRelative change represents a comparison between the computed number and observed number (i.e., reporting coverage = 0.25).