Seroconversion rate after vaccination against COVID-19 in patients with cancer—a systematic review

•History of cancer is linked to higher mortality rates due to COVID-19.•Data on the immunogenicity of COVID-19 vaccines in PsC are scarce.•This review included prospective studies that evaluated immunogenicity of vaccines against COVID-19 in PsC.•Vaccination seems overall safe and immunogenic after well-conducted vaccination schedules.•Hematologic patients receiving B-cell-depleting agents in the last 12 months are the most at risk of poor...