(Absenteeism rate due to influenza) × (Vaccine efficacy) × (‘Flu period in weeks) × (Hours worked per week) × (Average hourly wage of VE)

SUBTRACT

((Hours lost due to adverse reaction) + (Hours lost during vaccination)) × (Average hourly wage of VE) + ((Hours spent by OHN per VE) + (Hours spent by OHN to promote program per VE)) × (Average hourly wage of OHN) + (Cost of each vaccine) + (Cost of other materials per vaccination)

OHN Occupational health nurse; VE Vaccinated employee