But diapers aren't meant to safeguard against vapours or other elements in tear gas, so neither will a surgical mask. The N95 or X301 do not protect the wearer from pollution. Yu says the respirators block containments in particle form only, not gases like ozone and nitrogen dioxide.
Flu vaccine is an inactivated vaccine, meaning that it contains killed influenza virus. The killed influenza virus is injected into muscles or skin and stimulates the immune system to produce an immune response (antibodies) to the influenza virus.
Fluvirin is a brand name for the vaccine used to prevent infection by influenza virus. The vaccine is reformulated every year. It includes the most current problematic viral strains. Public health departments study new strains and recommend changes in the vaccine every year. Fluvirin contains inactivated virus particles as antigens that stimulate the immune system to develop antibodies to the flu virus.