What was the cause of death for Freddie Mercury?

Freddie Mercury's cause of death was pneumonia, which was a complication of AIDS. Despite keeping his diagnosis private, Mercury had been battling the disease for several years. Pneumonia is a lung infection that can be particularly severe for individuals with a weakened immune system, such as those with AIDS. It ultimately led to his demise on November 24, 1991, at the age of 45.