What best describes the key discovery of research in efforts to control diseases? Scientists found out which genes to monitor to find signs of danger.
Scientists discovered a cure for all flu viruses.
Scientists concluded that flu viruses easily transfer.
Scientists still need to learn more in order to prevent epidemics.

the second sentence is a great revision in my opinion. that would be a great topic.

explanation:

1, 4, and 5 are all conflicts

in our power to make a world happy - to teach mankind the art of being so - to a character hitherto unknown - and to have, as it were, a new creation intrusted to our hands, are honors that command reflection, and can neither be too highly estimated,