Hospital emergency services can be a critical network for detecting HIV cases that are going undetected. In Spain it is estimated that 13% of people with HIV do not know they have it.

Almost half of HIV diagnoses in Spain are made late, when the immune situation of patients is already bad. The number of tests performed grew from 7,080 to 13,436 tests, up 75%. Similarly, the rate of positives experienced a rise, which reached 1.67% from 0.92% previously.