Pandemic influenza A H1N1/09 virus infection in hematopoietic SCT recipient.

摘要

In April 2009, the first cases of the novel influenza A H1N1 virus infection were reported in Mexico. As of 27 October 2009, the novel influenza H1N1 virus had caused at least 5642 deaths reported worldwide. The pandemic influenza H1N1/09 virus infection was considered widespread in Brazil on 16 July 2009 and after 2 months, there were 9249 confirmed cases, including 699 deaths.Clinical presentation may range from mild symptoms to cases of severe clinical presentation and death due to pneumonia and respiratory failure. Defined high-risk groups are thought to be similar to those for seasonal influenza, including young children and elderly patients, pregnant women and patients with chronic medical conditions, especially immunocompromised hosts.