Experiments have shown immunization with a variety of SARS vaccines resulted in pulmonary immunophathology once challenged with the SARS virus.” The paper also cites research showing “Antibodies elicited by a SARS-CoV vaccine enhanced infection of B cell lines in spite of protective responses in the hamster model.”

Negro Francesco. Viewpoint: Is Antibody-Dependent Enhancement Playing a Role in COVID-19 Pathogenesis? Swiss Medical Weekly. Vol. 150:w20249, 16 April 2020. https://smw.ch/article/doi/smw.2020.20249.