Healthy people who caught the H1N1 flu during the 2009 pandemic may have been protected against developing (x-ray) confirmed pneumonia by taking the antiviral drug oseltamivir (Tamiflu), according to a study from China. The researchers call for continued investigation into the effectiveness of antiviral treatment to allow for improvement both in clinical treatment and public health guidance. The study was conducted among 1300 Chinese patients with confirmed 2009 H1N1 infection.

1. Yu H, Liao Q, Yuan Y, et al. Effectiveness of oseltamivir on disease progression and viral RNA shedding in patients with mild pandemic 2009 influenza A H1N1: opportunistic retrospective study of medical charts in China. BMJ 2010; 341: c4779. (open access)