If a healthcare provider is exposed to a patient with a confirmed HIV infection, what is the immediate action required based on testing?

The immediate action required when a healthcare provider is exposed to a patient with a confirmed HIV infection is to conduct further testing on the patient. This is crucial because it allows for a better understanding of the situation regarding the patient's viral load and infectiousness at the time of exposure. Testing the patient can help determine the appropriate steps for post-exposure prophylaxis (PEP) for the exposed healthcare provider, although the provider's own status should also be assessed promptly.

While all listed actions may be part of a comprehensive response plan, obtaining additional information about the patient’s HIV status, such as their viral load and whether they are on antiretroviral therapy, is essential to guiding further actions and ensuring the safety of both the healthcare provider and future patients.