https://www.thelancet.com/journals/laninf/article/PIIS1473-3099(12)70121-4/fulltext
We estimate that globally there were 201200 respiratory deaths (range 105700–395600) with an additional 83300 cardiovascular deaths (46000–179900) associated with 2009 pandemic influenza A H1N1. 80% of the respiratory and cardiovascular deaths were in people younger than 65 years and 51% occurred in southeast Asia and Africa.