Epidemiological dynamics of the 2009 influenza A(H1N1)v outbreak in India
We analyse the time-series data for the onset of A(H1N1)v influenza pandemic in India during the period 1 June–30 September 2009. Using a variety of statistical fitting procedures, we obtain a robust estimate of the exponential growth rate ?λ? j 0.15. This corresponds to a basic reproduction number R0 j 1.45 for influenza A(H1N1)v in India, a value which lies towards the lower end of the range of values reported for different countries affected by the pandemic.
http://www.ias.ac.in/currsci/10apr2011/1051.pdf