Final answer:
An infectious disease can be spread through contact from one person to another, but not all infectious diseases are equally contagious.
Step-by-step explanation:
An infectious disease is any disease caused by the direct effect of a pathogen. Pathogens can be cellular (bacteria, parasites, and fungi) or acellular (viruses, viroids, and prions). Some infectious diseases are also communicable, meaning they can be spread from person to person through direct or indirect mechanisms.
However, not all infectious diseases are equally contagious. The degree of contagiousness usually depends on the method of transmission. Measles, for example, is a highly contagious disease that can be transmitted through coughing or sneezing. On the other hand, diseases like gonorrhea are not as contagious because they require close intimate contact, usually sexual, between an infected person and an uninfected person.
Therefore, the statement that all infectious diseases can be spread through contact from one person to another is false.