contracted the pandemic virus is probably more efficient in bringing down the attack rates. Aside from the transmissibility of the virus, geographical features may also affect the propagation potential of a false negative. In urban areas such as cities, where close contact due to work and public transport is inevitable, a single untreated case can rapidly lead to the formation and spread of influenza clusters. One other aspect which can be further investigated is the role of public transport in transmitting the pandemic virus. Public transport such as buses and subways not only facilitates the displacement of carriers between locations within the city, it also brings several individuals into close proximity, increasing the likelihood of the virus infecting several other people. A limitation of current diagnostic measures in most countries is that a symptomatic person has to travel to a local hospital for testing, which requires commuting, mostly on public transport. As mentioned previously, it is possible for a symptomatic individual to either send a respiratory specimen to the hospital, or request for a fast testkit for diagnosis at home, hence alleviating the need for public transport. Both measures can potentially reduce the risk of exposure to others significantly.