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61 - Medical sciences (482)
616.9 - Communicable diseases. Infectious and contagious diseases, fevers (33)
COVID-19 (33)
616.7 - Pathology of the organs of locomotion. Skeletal and locomotor systems (27)
616.2 - Pathology of the respiratory system. Complaints of the respiratory organs (23)
617 - Surgery. Orthopaedics. Ophthalmology (22)
616.3 - Pathology of the digestive system. Complaints of the alimentary canal (20)
Children -- Health and hygiene (19)
Niños -- Salud e higiene (19)
159.9 - Psychology (17)