Which term is used to describe a disease that can easily be transmitted from one person to another?

Infectious disease

 The correct answer is (d) Infectious disease.

An infectious disease is a type of disease that can easily be transmitted from one person to another. These diseases are caused by pathogenic microorganisms such as bacteria, viruses, fungi, or parasites. When an infected individual comes into contact with a susceptible person, the microorganisms can be transmitted through various means, such as direct physical contact, respiratory droplets, contaminated surfaces, or through vectors like mosquitoes.

Infectious diseases can spread rapidly within a population, leading to outbreaks or epidemics if proper preventive measures are not in place. Examples of infectious diseases include the common cold, influenza, tuberculosis, malaria, and COVID-19. Understanding the nature of infectious diseases and implementing measures to prevent their transmission, such as vaccination, good hygiene practices, and proper disposal of infectious waste, are crucial for maintaining public health and preventing the further spread of these diseases.