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 injected vaccine that prevents a person from getting the most-common strains of seasonal influenza. Reactions to the shot are rare, but for some people, especially children who are receiving the shot for the first time, a reaction may occur.