The current forecasts for an Influenza Pandemic Resurgence of H1N1 mutating with a seasonal flu strain is just less than 0.5% of the population (for 'First World' Countries).
For example, Canada is predicting about 112,000 deaths in the above scenario with a population of 27 million. This death rate would be over the course of a 3-6 month period meaning approx 20,000-40,000 deaths per month averaged across the entire country. This is essentially double the number of people that die annually from regular or seasonal flu.
A sad and sobering figure for certain but definitely not the stuff of 'armageddon' type predictions.
Uzzah