1st August 2023

A 28-year-old man diagnosed with HIV presents to A&E with a four day history of progressive shortness of breath and dry cough.

A 28-year-old man diagnosed with HIV presents to A&E with a four day history of progressive shortness of breath and dry cough. His oxygen saturations at rest are measured at 98% on room air, but these drop to 92% on exertion.

What is the most likely diagnosis?

Select the SINGLE most appropriate option from the list below. Select ONE option only.