Input Variables Used in Analysis*?.

*Base case values are given with the range used for analysis given within the brackets ( ) where applicable. The input variables were modeled as triangular distributions centered on the base values with the minimum and maximum values given by the extreme values in the ranges.?All healthcare costs were converted to 2007 US dollars and were compounded using the consumer price index for Singapore6.?High risk includes asthma, chronic obstructive pulmonary diseases, heart, and diabetes patients. ?Ministry of Health, Singapore. ??Ministry of Manpower, Singapore.��Based on mortality among those having clinical influenza.?Average present value of future earnings lost per death of an individual of average age in the age group: using the 3% discount rate, of expected lifetime earnings and housekeeping services, weighted by age and adjusted to 2007 SGD$ dollars (multiplying by a factor of 0.24) [9].#The rate is based on hospitalizations among those having clinical influenza. The ranges are calculated based on a factor of the base cases versus the mortality rate.**USD$84 for lost work day, USD$55 for unspecified days lost (taking care of ill child/elderly, and additional days lost post-hospitalization).??USD$20 per dose assuming 2 doses were required, and USD$7 for costs of administration and side effects.