Final answer:
Hypertension is not a contagious disease; it is a non-communicable condition that does not pose a threat of transmission in a salon, unlike Influenza, the Common Cold, or Chickenpox which are contagious and can be spread.
Step-by-step explanation:
Among the options provided, Hypertension is NOT a common contagious disease that would prevent a salon from servicing a client. Influenza, the Common Cold, and Chickenpox are all contagious infections that are transmissible between individuals and can be spread in a salon environment. In contrast, Hypertension is a non-communicable condition characterized by persistently high blood pressure and poses no risk of transmission from person-to-person in a salon setting.
Nail salons should follow strict hygienic practices to reduce the risk of infections being transmitted to clients which include proper sanitation of instruments, hand hygiene, and using safe professional nail products. Licenses and regular inspections are also crucial to ensure compliance with health and safety regulations.