CD40LG and pneumonia caused by chlamydia: SARS-CoV-2, HBV antigen, HCV antigen, HIV antigen, HIV antibodies, influenza A virus H1 and H3 subtype antibodies IgM, influenza B virus antibodies IgM, Adenovirus (ADV) antibodies IgM, RSV antibodies IgM, and chlamydia pneumonia antibodies IgM were negative.