Can an infectious disease be spread from one organism to another?

Infectious diseases are spread through the transfer of infectious agents from one organism to another. These infectious agents can include viruses, bacteria, fungi, and parasites. They can be spread through various routes, such as contact with infected individuals or animals, contaminated surfaces or objects, or through the air. Infectious diseases can also be transmitted through vectors, which are organisms that carry and transmit infectious agents from one host to another.