Pneumonia, Pneumocystis

This is an open-labeled, prospective clinical study aims at collecting and analyzing baseline characteristics of autoimmune inflammatory rheumatic disease (AIIRD) patients receiving sulfanilamide for preventive purposes, as well as subsequent follow-up data, in order to assess the efficacy and safety of the medication. Additionally, through a stratified analysis of risk factors, the investigators aim to identify the AIIRD population that would benefit most from preventive medication based on a favorable benefit-risk ratio.