Final answer:
Advise the client to take complete rest and seek medical attention due to the potential severity of their symptoms, including fever, night sweats, and fatigue.
Step-by-step explanation:
If a client is experiencing symptoms such as a fever, night sweats, and increased fatigue, advising them to continue with the regular exercise routine could be detrimental to their health. These symptoms may be indicative of an underlying health condition that requires medical attention. Therefore, the most appropriate action would be to advise a complete rest until fully recovered and suggest that the client consults with a healthcare provider for an accurate diagnosis and appropriate treatment plan.
Patient B's symptoms including weight loss, profuse sweating, increased heart rate, and difficulty sleeping, as well as the clinical focus on Marsha's symptoms post-travel, reinforce the need for caution and medical evaluation before continuing any physical activity.