Subject(s)

Antineoplastic Agents/toxicity , COVID-19/epidemiology , Hepatic Veno-Occlusive Disease/chemically induced , Liver Failure/chemically induced , Senecio/poisoning , Adolescent , Antineoplastic Agents/adverse effects , COVID-19/diagnosis , COVID-19/virology , Child , Ethics, Research , Health Occupations/statistics & numerical data , Hematopoietic Stem Cell Transplantation/standards , Hepatic Veno-Occlusive Disease/history , Hepatic Veno-Occlusive Disease/pathology , History, 20th Century , Humans , Liver Failure/epidemiology , Research/statistics & numerical data , Research/trends , SARS-CoV-2/genetics , Senecio/adverse effects , South Africa/epidemiology