1. Roser M et al. Coronavirus Pandemic (COVID-19). Our World in Data, 2020. Published online at OurWorldInData.org (Retrieved from: ‘https://ourworldindata.org/coronavirus’ [Online Resource]).
2. Li WX. Worldwide inverse correlation between Bacille Calmette-Guérin immunization and COVID-19 morbidity and mortality. Res Sq. 2020. https://doi.org/10.21203/rs.3.rs-42927/v1.
3. Hale T, Angrist N, Cameron-Blake E, Hallas L, Kira B, Majumdar S, Petherick A, Phillips T, Tatlow H, Webster S. Oxford COVID-19 Government Response Tracker. Blavatnik School of Government.
4. World Health Organization. BCG vaccines: WHO position paper – February 2018. Vaccins BCG: Note de synthèse de l’OMS – Février 2018. Wkly Epidemiol Rec. 2018;93:73–96.
5. Hamiel U, Kozer E, Youngster I. SARS-CoV-2 rates in BCG-vaccinated and unvaccinated young adults. JAMA. 2020;323:2340–1. https://doi.org/10.1001/jama.2020.8189.