Objective:to investigate factors associated with the SARS-CoV-2 infection among health professionals from university hospitals.Method:a multicenter, mixed approach study with concomitant incorporated strategy, carried out with 559 professionals in the quantitative stage, and 599 in the qualitative stage. Four data collection instruments were used, applied by means of an electronic form. The quantitative analysis was performed with descriptive and inferential statistics and the qualitative data were processed by means of content analysis.Results:the factors associated with the infection were as follows: performance of the RT-PCR test (p<0.001) and units offering care to COVID-19 patients (p=0.028). Having symptoms increased 5.63 times the prevalence of infection and adhering to social distancing most of the time in private life reduced it by 53.9%. The qualitative data evidenced difficulties faced by the professionals: scarcity and low quality of Personal Protective Equipment, work overload, physical distancing at work, inadequate processes and routines and lack of a mass screening and testing policy.Conclusion:the factors associated with the SARS-CoV-2 infection among health professionals were mostly related to occupational issues.