Infectious diseases can spread rapidly from "summary" of Human Biology by Cecie Starr,Beverly McMillan
Infectious diseases have the potential to spread rapidly, posing a significant threat to human populations. When a pathogen enters a community, whether through direct contact with an infected individual or through contaminated food or water, it can quickly move from person to person, creating a chain reaction of illness. This rapid spread is facilitated by factors such as close living conditions, global travel, and limited access to healthcare. In densely populated areas, such as cities or refugee camps, infectious diseases can easily jump from one person to another. Crowded living spaces, shared facilities, and limited sanitation make it easier for pathogens to thrive and infect multiple individuals. Additionally, the movement of people across borders and continents can quickly transport diseases to new regions, where they can take hold and spread furth...
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