Relier Pairs Epidemic MatchingVersion en ligne assignment par Benjamin D Morgan 1 Herd Immunity 2 Vaccine 3 Epidemic definition 4 viral disease 5 Virus 6 Immune 7 Possible Epidemic Vaccination Percentage Level A harmless dead or weakened virus/bacteria that stimulates a person's immune system to mount defenses against the virus/bacteria When a virus/bacteria cannot cause a person to become sick. You are considered __________ to this virus/bacteria A sub-microscopic particle that must infect living plant or animal cells to reproduce A sickness caused by a virus is called When below 85-95% of the population is vaccinated against a virus When 85-95% of the population is vaccinated against a virus infectious disease that spreads rapidly and sickens a large number of people