In the last days of 2019, the coronavirus (COVID-19) epidemic was added to the avian influenza (H5N1) and swine flu (H1N1) outbreak in the world and in our country. These diseases not only negatively af-fected almost every area of our lives, but also caused important prob-lems and consequences in working life. In this study, primarily we will evaluate the concept of work accident taking into consideration in the sense of Social Insurance and General Health Insurance Law No. 5510, afterwards we will evaluate whether the infectious diseases, especially swine flu and coronavirus can be accepted as a work accident under this Law, also taking into consideration the decision of the 21st Civil Cham-ber of the Supreme Court in 2019. In the study, we will not include explanations as to whether or not the employer is responsible for the infectious disease because we aimed to evaluate whether or not the in-fectious disease that an employee catched was a work accident within the meaning of Law No. 5510.