influenza A (H1N1) | influenza da nuovo virus A/H1N1 | influenza messicana | influenza nordamericana | nuova influenza A/H1N1
2009 H1N1 flu | human swine influenza A(H1N1) | influenza A(H1N1) | influenza A(H1N1)v | Mexican flu | Mexican influenza | North American flu | North American influenza | novel H1N1 flu | novel influenza A(H1N1)