A reverse precaution sign on a patient's room indicates that the patient is:

A reverse precaution sign is an important indicator in healthcare settings that helps inform staff about the necessary safety measures when interacting with a specific patient. When a patient has a compromised immune system, they are particularly vulnerable to infections, making it crucial for healthcare workers to take precautions to avoid introducing pathogens into their environment.

The designation that a patient may be infected by you implies that the presence of typical microorganisms, which could be harmless to a healthy individual, could pose a significant risk to this patient. Therefore, healthcare personnel are advised to adopt stringent hygiene practices, such as wearing appropriate personal protective equipment (PPE) and sanitizing their hands thoroughly before and after entering the patient's space.

Understanding this context is vital because the goal is to protect the patient from potential infections, which means healthcare workers need to be especially cautious around those with compromised immune systems, whether due to medical conditions or treatments like chemotherapy. The other choices do not accurately describe the implications of a reverse precaution sign and so do not reflect the appropriate level of caution necessary for such patients.