Subject(s)

Antibodies, Bacterial/blood , COVID-19/complications , Mucocutaneous Lymph Node Syndrome/complications , Mycoplasma pneumoniae/pathogenicity , Pneumonia, Mycoplasma/complications , SARS-CoV-2/pathogenicity , Severe Acute Respiratory Syndrome/complications , Adolescent , Blotting, Western , COVID-19/diagnosis , COVID-19/pathology , COVID-19/virology , COVID-19 Testing , Child , Child, Preschool , Coinfection , Conjunctivitis/diagnosis , Conjunctivitis/physiopathology , Edema/diagnosis , Edema/physiopathology , Exanthema/diagnosis , Exanthema/physiopathology , Female , Fever/diagnosis , Fever/physiopathology , Humans , Infant , Male , Mucocutaneous Lymph Node Syndrome/diagnosis , Mucocutaneous Lymph Node Syndrome/pathology , Mucocutaneous Lymph Node Syndrome/virology , Mycoplasma pneumoniae/growth & development , Pneumonia, Mycoplasma/diagnosis , Pneumonia, Mycoplasma/microbiology , Pneumonia, Mycoplasma/pathology , SARS-CoV-2/growth & development , Severe Acute Respiratory Syndrome/diagnosis , Severe Acute Respiratory Syndrome/pathology , Severe Acute Respiratory Syndrome/virology , Stomatitis/diagnosis , Stomatitis/physiopathology