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.
There are two different types of flu vaccines, trivalent and quadrivalent. Trivalent vaccines protect against two influenza A viruses (an H1N1 and an H3N2) and an influenza B virus. Trivalent vaccines are available in: Standard-dose trivalent shots (IIV3), approved for use in people six months and older.