The number of clinical infections per 100,000 is presented when basic reproductive ratio (ℛ0) is 1.4 and the peak of H1N1 pandemic occurs on (a) Nov 1, 2009; (b) Dec 1, 2009; (c) Jan 1, 2010; (d) Feb 1, 2010. Vaccination was assumed to start on Oct 1, 2009.