Fernandez, Simon Christopher, and John Percival Fernandez. “Knowledge of People in the East London District of South Africa about Coronavirus SARS-CoV-2: An Online Survey”. ABCS Health Sciences 46 (November 24, 2021): e021230. Accessed July 2, 2022. https://www.portalnepas.org.br/abcshs/article/view/2005.