Inclusion criteria for subjects with dermatological diseases;  diagnosis of psoriasis, hidradenitis suppurativa, or atopic dermatitis, any grade of severity; stability of the cutaneous disease; ongoing treatment.  Inclusion criteria for subjects with HIV or HBV:  documented HIV or HBV infection; treatment with antiviral therapy; viral suppression (HIV-RNA or HBV-DNA) for at least 6 months.  Inclusion criteria for both groups:  age ≥ 18 years willingness to provide informed consent.  Exclusion Criteria:  - a history of intellectual disability, bipolar disorder, psychosis or schizophrenia, or current high suicide risk.