Question

to help prevent people from getting the ebola virus, countries around the world paid to help doctors develop a new vaccine. now that the vaccine has been made, doctors will need to experiment on a large number of people to find out if it works safely. what is the greatest limitation that scientists are dealing with as they try to figure out how to experiment with the ebola vaccine?

• time
• complexity
• money
• ethics

Explanation:

Testing a vaccine on humans requires adhering to strict ethical standards to avoid harm to participants, especially for a potentially dangerous virus like Ebola. The text notes the need to experiment on many people to confirm safety, which creates major ethical concerns about risking human health in trials. Time, complexity, and money are challenges but not the greatest limiting factor here.

Answer:

ethics