Pneumocystis Carinii Pneumonia (PCP) cases reported In June 1981, the U.S. Centers for Disease Control and Prevention (CDC) published a Morbidity and Mortality Weekly Report (MMWR) depicting five cases of a very rare lung infection, Pneumocystis carinii pneumonia (PCP), in young and previously healthy gay men living in Southern California. Besides PCP, these men had other unusual infections, which showed that their immune systems were also greatly compromised.  In fact, two of the men were dead by the time the report was published. What was significant about this edition of the MMWR was that it marked the first official reporting