- Which of the following is necessary for a virus to reproduce?
Your answer:
a living host cell
a vaccine
a high body temperature
sunlight, water, and food
- Vaccines protect us against dangerous viral diseases by training the body to recognize and destroy specific invading viruses. Vaccines are made from
Your answer:
weakened or dead versions of a dangerous virus.
antibiotics.
human white blood cells.
medicines that cure the symptoms of viral diseases.
- Which of the following diseases has NOT been reduced or eliminated by vaccines?
Your answer:
smallpox
AIDS
polio
measles
- A natural vaccination happens when
Your answer:
a doctor gives a person a measles vaccine.
a person becomes immune to chicken pox after contracting it.
a person catches a cold.
after contracting influenza once, a person can contract it again.
- Viruses are carried within the fluids and tissues of the body. They are spread between people in different ways, including
Your answer:
contact with contaminated blood.
insects that transmit infected blood.
contact with contaminated saliva or mucus.
all of the above.
- The immune system protects the body from disease. Because the AIDS virus weakens the immune system,
Your answer:
people with AIDS are more vulnerable to other diseases.
the AIDS virus is spread very easily.
people with AIDS are immune to all other diseases.
all of the above.
- Viruses in the body are destroyed by
Your answer:
red blood cells.
white blood cells.
vaccines.
antibodies.
- Before its extinction in 1978, for how long had humans been affected by smallpox?
Your answer:
60 years
400 years
1,000 years
over 3,000 years
- Some types of viruses are spread between animals and humans. An example of this is
Your answer:
a dog infected with rabies can infect people by biting them.
all colds are spread from cats to people.
horses often spread chicken pox to children.
a deer infected with measles will infect anyone who walks near it.
- What ability do viruses have that we are trying to turn to our own advantage?
Your answer:
the ability to target specific areas of the body
the ability to spread quickly
the ability to break into cells
the ability to mutate and evolve