COVID-19(10) varicella.(9) Cost-benefit analysis(6) Economy in health care and organizations(6) Vaccines(6) pediatrics(4) Outpatient Care(3) Burden of disease(3) Hospitalization(3) SARS-CoV-2(2) zoonoses.(2) Child(2) respiratory syncytial virus.(2) education(2) cirrhosis(1) Neoplasms.(1) Hypereosinophilia(1) coronavirus(1) Proteinuria(1) Rickettsia slovaca infection(1) PCR(1) responsible tenure(1) health care staff(1) habits.(1) Chemotherapy(1) Vaccines.(1) reinfection.(1) respiratory infections(1) Tuberculosis(1) anti-N-methyl-D-aspartate receptor encephalitis(1)