Tagged cancer treatment, Center for Melanoma and Cancer Immunotherapy, Covid-19, Dr. Azzam Salach, Dr. Marc Wigoda, fear contracting Covid-19, Hadassah, hadassah international, Jonathan Cohen, ONCOLOGY, preventative treatment, Prof. Aron Popovtzer, Prof. Ayala Hubert, Prof. Beatrice Uzieli, Prof. Michal Lotem, Sharett Institute of Oncology