35. Influenza virulence factors Strains of the H5N1 influenza A virus that are virulent in mammals, including mice and humans, have alterations in the sequences of any of three viral proteins hemagglutinin (HA), the viral polymerase protein PB2, and the nonstructural protein NS1. Influenza A virus has 8 genomic RNA strands and 10 proteins, as shown. CREDIT: P. HUEY/SCIENCE ( Science Magazine > 17 March 2006 > Krug , pp. 1562 - 1563)
40. People 6 months through 24 years of age (especially those with higher risk for influenza-related complications like children younger than 5 years and those who have high risk medical conditions), and,
41. People 25 years through 64 years of age who have certain medical conditions that put them at higher risk for influenza-related complications.
42.
43.
44. The same manufacturers who produce seasonal flu shots are producing 2009 H1N1 flu shots for use in the United States this season.
45.
46. The nasal spray vaccine for use in the United States is being made by MedImmune, the same company that makes the seasonal nasal spray vaccine called āFluMistĀ®.ā
47. The 2009 H1N1 nasal spray vaccine is being made in the same way as the seasonal nasal spray vaccine.