What does it mean when a disease is termed 'infectious'?

When a disease is termed 'infectious', it means that it can be transmitted through infection between individuals. This implies that the disease is caused by pathogens, such as bacteria, viruses, fungi, or parasites, which can invade a person's body and multiply, leading to illness. Infectious diseases can be spread through various means, including direct contact, airborne transmission, bodily fluids, or contaminated surfaces.

Understanding this definition is crucial in the field of health and safety, especially for those in professions relating to personal care, such as esthetics and lash application. Practitioners must be aware of how infectious diseases spread to implement proper hygiene and sanitation practices to protect both themselves and their clients. The other options describe characteristics that do not accurately reflect the nature of infectious diseases.