Inclusion criteria:  both sexes; aged 18 to 60 years; scoring 45 or more on the PCL-5 PTSD developed (or aggravated by) as a result of direct or indirect exposure to COVID-19 [e.g., health professionals, people who tested positive for Covid-19 (or their relative or close friends), or those who quarantined, isolated or socially distanced themselves]; Participants should be able to read, write and follow instructions, and have access to the a stable internet connexion.  Exclusion Criteria:  severe suicide risk (plans, attitudes or suicide attemps for the last 12 months); self-mutilation behavior (for the last 12 months); already in psychotherapy; psychotic symptoms; current substance abuse or addiction (last 12 months).