Matching Pairs Epidemic MatchingOnline version assignment by Benjamin D Morgan 1 Virus 2 viral disease 3 Vaccine 4 Possible Epidemic Vaccination Percentage Level 5 Immune 6 Herd Immunity 7 Epidemic definition infectious disease that spreads rapidly and sickens a large number of people A sickness caused by a virus is called A sub-microscopic particle that must infect living plant or animal cells to reproduce When below 85-95% of the population is vaccinated against a virus 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 When 85-95% of the population is vaccinated against a virus