Health care workers (HCWs) work in very high risk areas, a lot of them getting the virus and some of them died. They are difficult to be replaced, leading to collapse of health system and more spreading of the virus. By using the keywords, searching in different data bases in 2019, 2020, for literatures in different domains, language, geographical and scientific manual and looking for references with in the articles. These are read and analyzed. The most important preventive measures of COVID19 infection of HCWs are education and training of them, excluding those with risk factor of getting the virus, proper use of Personal protective equipment (PPE), primary case control, environmental factors control, and resources control. HCWs are at very high risk for COVID19. It is prevented by, education and training of them, excluding those with risk factor of getting the virus, proper use of PPE, and control of primary case, environmental factors, and resources.