While some Israeli health authorities this week expressed cautious optimism regarding measures to control the spread of the coronavirus, questions remained over the extent of testing being conducted, in part due to challenges in obtaining testing agents used to analyze the samples. The diagnostic tests are based on assessing whether test samples contain the genomic sequence of the coronavirus. Another kind of test, currently not being carried out in Israel is an antibody test, based on a blood sample to determine whether a person has coronavirus antibodies. KAN's Naomi Segal heard more about the coronavirus testing process from Professor Yonat Shemer-Avni head of clinical virology at Soroka University medical center in Beersheva, and a member of the immunology and microbiology department at Ben Gurion University of the Negev.