Which of the following indicates a need for further teaching regarding visitor policies for a client undergoing chemotherapy?

The indication that visitors should not bring fresh flowers to a client undergoing chemotherapy reflects an important understanding of the susceptibility of these patients to infection. Chemotherapy can significantly weaken the immune system, making patients more vulnerable to bacteria and other pathogens that might originate from fresh plants. Fresh flowers can harbor mold spores or bacteria, which could be harmful in a healthcare environment, particularly for those with compromised immunity.

In contrast, the other options display an awareness of appropriate precautions. For instance, having visitors wear masks helps reduce the risk of airborne infections, which is crucial for a patient whose immune system is weakened. Not allowing visitors at all may be an overreaction, as many patients benefit from social support, and with proper precautions, visitors can be crucial to their well-being. Lastly, permitting pre-packaged snacks aligns with best practices, as these can be safely consumed without the risk associated with contaminated food. Therefore, emphasizing the need to avoid fresh flowers is an essential part of keeping chemotherapy patients safe and healthy during their treatment.