H1N1 in post-pandemic period
Following the pandemic of 2009, the H1N1 virus had largely run its course by August 2010 and had entered a post-pandemic period.
Based on knowledge of past pandemics, WHO expects the H1N1 virus to continue to circulate as a seasonal virus for some years to come, and issued guidance on epidemiological and virological monitoring, vaccination, and the clinical management of cases. WHO secured and delivered 78 million doses of the H1N1 vaccine to 77 countries who could not have otherwise obtained them.