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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)