What type of agent is capable of killing viruses?

A virucide is specifically designed to inactivate or destroy viruses, making it the correct choice for this question. These agents function by targeting the viral structure and processes, effectively preventing viruses from infecting host cells. Virucides can be found in various applications, including medical settings, where the control of viral infections is critical.

Antiseptics and disinfectants also play roles in microbial control, but their primary functions differ from that of a virucide. Antiseptics are typically used on living tissues to control infections, while disinfectants are used on inanimate objects and surfaces to reduce pathogens, including bacteria and fungi. However, not all disinfectants are effective against viruses; some may only target bacteria.

Fungicides specifically target fungi and are not effective against viruses, which further illustrates the specialized action of virucides within the realm of microbial agents. Thus, acknowledging the specific capability of virucides to kill viruses reinforces their critical role in infection control and management.