Other auxiliary indicators measured are the costs incurred due to the amount of testkits being used (C t ) and the antiviral drugs being issued (C d ). This is in view of the limited supply of drugs and additionally, in our case, diagnostic testkits. Another resource that is often overlooked is the holding capacity of the influenza hospital. While patients are waiting for diagnosis or their test results, they are required to stay at the hospital (with the exception of diagnostic approach D3). Hence the peak waiting room occupancy (C w )-the maximum number of people waiting at any one time-is another indicator that is measured. To gauge the economic impact of the various intervention policies, we measure the number of work hours lost (C h ) by all individuals who underwent diagnosis, treatment or were traced.