Which of the following is NOT a characteristic of direct transmission?

Direct transmission refers to the transmission of pathogens from an infected individual to a susceptible individual through immediate physical contact or close proximity. Actions such as shaking hands, coughing, and kissing all involve direct person-to-person contact or exchange of respiratory droplets, which makes them characteristic of direct transmission.

In contrast, using contaminated tools pertains to indirect transmission. This occurs when pathogens are transferred from one person to another via an intermediary object, such as a tool or surface that has not been properly sanitized. Hence, this action does not involve immediate direct contact between individuals, which is why it is not characteristic of direct transmission. Understanding the distinction between direct and indirect transmission is crucial in infection control and prevention practices in settings such as salons, where the risk of transmitting infections can be managed through proper sanitation and hygiene protocols.