| A | B |
|---|
| host | an organism that supports a parasite |
| capsule | a protective layer of slime around the cell wall |
| Bacteriophage | a virus that infects bacteria |
| envelope | the tough coating around an endospore which enables the DNA and cytoplasm to lie dormant for many years |
| capsid | a protein covering that encases the virus |
| nucleic acid | an organic molecule, DNA or RNA, that stores and carries important information for cell function |
| helical virus | a virus in the shape of a helix, or spiral |
| virus | a biological particle composed of genetic material and protien that is not usually considered to be a living organism |
| DNA, RNA | the genetic material that contains and transmits information on cell growth, regulation and characteristic features |
| Vaccine | imitates the infectious pathogen |
| immune system | defend the body against pathogens |
| live attenuated vaccines | contain a weakened version of the virus |
| inactivated vaccines | contain a damaged non-infectious version of virus |
| naturally aquired immunity | possible to acquire after infection with the natural form of pathogen |
