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Table 4 Total costs before and after instituting vaccination for all pre-enlistees without a reported history of varicella infection or vaccination since 10 December 2010

From: An economic analysis of varicella immunization in the Singapore military

Periods

Dec 1, 2007 – Dec 10, 2010

Dec 11, 2010 – Dec 20, 2013

Number of varicella cases

311

124

Total cost of days lost (SG$) (a)

$287,848 (116,862-395,768)

$126,007 (51,157-173,250)

Number of outbreaks

41

3

Number of outbreaks per 10000

5.86

0.429

Total cost of outbreak management (SG$) (b)

585,694 (272,200 - 962,630)

48,352 (22,472 – 79,471)

Total number of work days lost (from both sickness and outbreaks)

6,128 (5,306 - 6,946)

1,083 (1,023 - 1,143)

Total number of work days lost (per 1000 servicemen) (from both sickness and outbreaks)

87.5 (75.8 - 99.2)

15.5 (14.6 - 16.3)

Total cost of outpatient consultations and medications (SG$) (c)

$11,360 (9,066 – 13,600)

$4,380 (3,497 – 5,245)

Number of vaccines administered

1,935

16,750

Cost of vaccinations given (SG$) (d)

$63,331.25

$528,362.94

Cost of side effects of vaccines (5 % × total number given vaccines × cost of 1 lost day) (SG$) (e)

$13,658 (5,545-18,779)

$136,069 (55,242-187,084)

Cost of vaccines given + side effects (SG$) (d) + (e)

$76,990 (68,880-82,110)

$664,400 (583,600-715,400)

Total costs excluding work days lost (SG$) (c) + (d) + (e)

$88,340 (82,290-95,630)

$668,800 (588,800-720,400)

Total costs including work days lost (SG$) (a) + (b) + (c) + (d) + (e)

$961,887 (471,356 – 1,449,954)

$843,171 (662,409 – 971,688)