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.
What's Inside a Flu Shot? Formaldehyde and Chicken Eggs All flu vaccines start with flu viruses: genetic material packaged in an envelope of proteins and fats, studded with yet more proteinsâantigensâthat push the bodyâs immune system into action. With thousands of possible flu variants out there, the World Health Organization looks at info from 141 labs around the world to determine which variants are most likely to circulate each year.