Answer:
I believe, the answer could be that the way they spread is by focusing attention on the human causes of infectious disease epidemics, such as land-use change, urbanization and industrialized food production, “Outbreak” teaches the modern lesson that human, animal and environmental health are all critically linked. Viruses only replicate inside living organisms, and adapt rapidly to a new host. One infection can spread to epidemic proportions in a matter of days.
Step-by-step explanation: