After reading Laura's network post, and House's response to it, John had contacted Laura, and then rushed downstairs. Fortunately, his flat was located right behind the hospital, so he simply had to rush across the little park- they weren't there, so he could only assume that Laura had moved the casualty into the hospital.
He hurried through the front doors of the hospital, finding Laura and the patient within.
"Hello, Laura," he smiled calmly, moving to the patient, feeling for a pulse and checking her airways. "A new arrival, I assume?" he asked. The woman was burning up such a high temperature, it was going to be his priority to get her cooled down.