Keywords: ADRs, adverse drug reactions; LTT, lymphocyte transformation test; MDH, multiple drug hypersensitivity; MDHS, multiple drug hypersensitivity syndrome; MP, Mycoplasma pneumoniae; Mycoplasma pneumonia; PA, particle agglutination; SJS/TEN, Stevens-Johnson syndrome/toxic epidermal necrolysis; Tregs, regulatory T cells; adverse drug reaction; lymphocyte transformation test; multiple drug sensitization syndrome.