Virus
a tiny, nonliving particle that enters and then reproduces inside a living cell
an organism that benefits by living with, on, or in a host in a parasitism interaction
able to work against or hold off an opposing force
protist
a substance used in a vaccination that consists of pathogens that have been weakened or killed but can still trigger the body to produce chemicals that destroy the pathogens
host
resistant
an organism that provides a source of energy or a suitable environment for a parasite to live with, in, or on
vaccine
parasite
single-celled organisms that lacks a nucleus; prokaryotes
bacteria
a eukaryotic organism that cannot be classified as an animal, plant, or fungus
