Flu virus more virulent but responding to vaccine

The Gorgas Memorial Institute for Health Studies (Icges) submitted a cultured sample of influenza A (H1N1) virus to two parallel studies, which showed  that  although it is more virulent, with a greater capacity to cause severe symptoms, it still responds to the vaccine as a preventive measure and to oseltamivir (Tamiflu) as a treatment for those who contract the disease.