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What term describes a disease caused by a pathogen that can spread between individuals?

  1. Microorganism

  2. Bacterium

  3. Infection

  4. Virus

The correct answer is: Microorganism

The term that describes a disease caused by a pathogen that can spread between individuals is "infection." An infection occurs when a pathogen, such as bacteria or viruses, enters the body, multiplies, and causes illness. It emphasizes the process of disease transmission and the resultant health impacts on an individual. While a microorganism is a general term that refers to any microscopic organism, including bacteria and viruses, it does not specifically indicate the capacity to cause disease or the transmissibility of that organism among individuals. A bacterium is a specific type of microorganism that can cause infections, but not all bacteria are pathogenic. Similarly, a virus is also a type of pathogenic microorganism, but it is just one category of pathogens that can lead to infections.