Common features of 2009 H1N1 influenza pandemic in different parts of the world revealed by log-log plot of the cumulative numbers of infected and deceased cases.

摘要

The log-log plot of the cumulative numbers of infected and deceased cases through the progress of the 2009 H1N1 pandemic gave a relation given by the equation logY = klogX - klogNo, where Y is the cumulative number of infected cases, X the cumulative number of deaths, k the coefficient representing the slope of the curve, and N_o the value of X when the curve crosses the X axis (1). The analysis was made with the data obtained up to July 6, 2009, when the epidemic was limited almost solely to the American continent and mortality on other continents was rare.