Video exercise. TED-Ed: “How do viruses jump from animals to humans?”

Watch the video and answer the questions below. Some are multiple-choice and others are open questions for which you need to write an answer. Do your answers on paper.

Questions

1. Which species would we expect pathogens to be most likely to jump between?
A. Distantly related species, in the same environment
B. Closely related species, in the same environment
C. Closely related species, in different environments
D. Distantly related species, in different environments

2. Given equal exposure, which species might we expect to be the greatest source of emerging infectious diseases in humans?
A. Chimpanzees
B. Dogs
C. Potatoes
D. Snakes

3. When a virus mutates this:
A. Helps the virus adapt to a new host
B. Can have no effect, be detrimental, or can be beneficial and help the virus adapt to its new host
C. Causes an outbreak

4. What does a virus need to bind to before it can enter host cells?
A. Host receptors
B. Immune cells
C. Host DNA

5. Where are viruses found?
A. Mostly in primates
B. Mostly in humans
C. In almost every form of life

6. What are the three steps are required for a pathogen to infect a novel host species?



7. What factors affect the likelihood of a pathogen successfully jumping to a new host?