Which disease does not spread through direct contact in a barber's setting?

The influenza virus is primarily spread through the respiratory droplets that are released when an infected person coughs, sneezes, or talks. This means that the primary mode of transmission is through the air rather than through direct contact with bodily fluids or surfaces. In a barber's setting, while close contact can facilitate the spread of respiratory illnesses, the nature of influenza's transmission distinguishes it from diseases like HIV/AIDS, Hepatitis B, and Herpes Simplex, which are transmitted through direct contact with infected blood, bodily fluids, or skin lesions.

HIV/AIDS is spread through direct contact with blood, semen, vaginal fluids, or breast milk from an infected person. Hepatitis B can be transmitted through contact with infectious bodily fluids, which include blood. Similarly, Herpes Simplex is spread through direct skin-to-skin contact with an infected area during an outbreak. These modes of transmission highlight the importance of sanitation and hygiene practices in barbershops to prevent the spread of those communicable diseases. Thus, the fact that influenza is not primarily spread through direct contact makes it the correct answer for this question.