Which type of disease can spread from one person to another?

Infectious diseases are caused by pathogens such as bacteria, viruses, fungi, or parasites and are characterized by their ability to be transmitted from one individual to another. They can spread through various means, including direct contact, respiratory droplets, contaminated surfaces, or vector organisms like mosquitoes. This transmission capability distinguishes infectious diseases from other types of diseases.

Chronic diseases, on the other hand, are long-lasting and often focus on lifestyle factors. Autoimmune diseases occur when the immune system mistakenly attacks the body’s own cells, while genetic diseases are inherited and arise from abnormalities in genes. These other categories do not involve direct transmission from person to person. Thus, the defining characteristic of infectious diseases is their communicability, making them the correct choice in this context.