[1] Callaway E, Ledford H, Viglione G, Watson T, Witze A. COVID and 2020: an extraordinary year for science. Nature 2020;588(7839):550 − 2. http://dx.doi.org/10.1038/d41586-020-03437-4CrossRef
[2] Wang L, Bi YH, Gao GF. Notes from the field: epidemiological model suggests D614G spike protein mutation accelerates transmission of COVID-19 — Worldwide, 2020. China CDC Wkly 2020;2(49):946-7. http://weekly.chinacdc.cn/en/article/doi/10.46234/ccdcw2020.247.http://weekly.chinacdc.cn/en/article/doi/10.46234/ccdcw2020.247
[3] European Centre for Disease Prevention and Control. Risk related to the spread of new SARS-CoV-2 variants of concern in the EU/EEA–first update. https://www.ecdc.europa.eu/en/publications-data/covid-19-risk-assessment-spread-new-variants-concern-eueea-first-update. [2021-1-5].https://www.ecdc.europa.eu/en/publications-data/covid-19-risk-assessment-spread-new-variants-concern-eueea-first-update
[4] Africa Center for Strategic Studies. Analyzing Africa’s Second Wave of COVID-19. 2021. https://reliefweb.int/report/world/analyzing-africa-s-second-wave-covid-19. [2021-1-5].https://reliefweb.int/report/world/analyzing-africa-s-second-wave-covid-19
[5] Nkengasong J. Let africa into the market for COVID-19 diagnostics. Nature 2020;580(7805):565. http://dx.doi.org/10.1038/d41586-020-01265-0CrossRef
[6] Bloomberg. More than 15 million shots given: Covid-19 vaccine tracker. https://www.bloomberg.com/graphics/covid-vaccine-tracker-global-distribution/. [2021-1-10].https://www.bloomberg.com/graphics/covid-vaccine-tracker-global-distribution/
[7] Nigeria Centre for Disease Control. Optimising SARS-CoV-2 testing capacity: NCDC pilots use of SARS-CoV-2 RDT in Nigeria. 2021. https://ncdc.gov.ng/reports/weekly. [2021-1-5].https://ncdc.gov.ng/reports/weekly
[8] Berkley S. COVAX explained. 2020. https://www.gavi.org/vaccineswork/covax-explained. [2021-1-5].https://www.gavi.org/vaccineswork/covax-explained