As 2009 H1N1 influenza vaccinations arrive in limited quantity, it's more important than ever to implement everyday flu prevention actions. Even if you've already been vaccinated for seasonal influenza, you may still be susceptible to illness. The mass availability of H1N1 vaccine has been estimated to occur mid to late November 2009. Availability and distribution at Hill Air Force Base will be widely reported when shipments arrive. At present, H1N1 vaccinations will be provided through your county health department.