washing hands
sterilization
Yes. Antibodies do prevent pathogens from infecting other cells.
Yes
be more specific please.
prevent the growth of microorganisms
Air contamination working hard
It contains pathogens which can spread disease.
yup
A Protozoa
No. Transmission is primarily via the fecal-oral route as the virus is excreted in an infected person's feces; good hand-washing habits can help prevent the spread of infection.
To prevent the spread of communism.
It doesn't.