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.
The flu shot is an inactivated vaccine (containing killed virus) that's given with a needle, usually in the arm. This season's vaccine protects against the three influenza viruses that research indicates will be most common during the season. This includes an influenza A (H1N1) virus, an influenza A (H3N2) virus, and an influenza B virus. The vaccine takes effect approximately two weeks after it has been administered as antibodies (substances in the blood that protect against infection) accumulate and provide protection against influenza.