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 vaccine is available as a shot and a nasal spray. The nasal spray vaccine is for healthy children and adolescents ages 2 to 17 (and in healthy adults ages 18 to 49). It is recommended, instead of the shot, for healthy children ages 2 to 8 years old.