Regarding the risk of COVID-19 infection, it was found that health workers had a statistically significant higher risk of disease in the group with wrong knowledge about hand hygiene (OR=4.69, 95% CI=1.95 - 11, 24, p=0, 0001), with no training in COVID-19 infection prevention and control (OR=2.50, 95% CI=1.07 - 5.82, p=0.03; health worker and and other staff involved in epidemic prevention and control who were in contact with patients within 1 m had a statistically significant higher risk of disease (OR=3.1, 95% CI=1.57 - 6.16, p=0, 0006).