Which determining factor indicates that Darius Lance requires immediate medical attention?

The determination that Darius Lance requires immediate medical attention based on a positive COVID-19 test is grounded in the potential severity of the virus and its infectious nature. A positive test indicates that he is actively infected, which can lead to serious complications, particularly if he presents with symptoms such as shortness of breath, chest pain, or confusion. Given the global health implications and the risk of transmission to others, prompt medical evaluation and intervention are critical to ensure appropriate care and to mitigate the risk of spreading the virus.

While high blood pressure, persistent headaches, and recent travel history may also warrant attention in certain contexts, they do not intrinsically demand immediate medical intervention as a positive COVID-19 test does. High blood pressure can be managed and assessed through routine care, persistent headaches could indicate various non-urgent conditions, and recent travel history is important for a broader assessment of risk but does not automatically necessitate immediate attention unless accompanied by concerning symptoms. Therefore, the situation presented by a positive COVID-19 test stands out as the most urgent, making it the determining factor for Darius Lance's immediate medical needs.