1. WHO. (2020). WHO Director-General’s opening remarks at the media briefing on COVID-19 - 11 March 2020. Available: https://www.who.int/dg/speeches/detail/who-director-general-s-opening-remarks-at-the-media-briefing-on-covid-1911-march-2020
2. cdc. (2020). Coronavirus Disease 2019 (COVID-19). Available: https://www.cdc.gov/coronavirus/2019-ncov/need-extra-precautions/people-at-higher-risk.html
3. WHO. (2020, 11 May). Coronavirus disease (COVID-2019) situation reports. Available: https://www.who.int/emergencies/diseases/novel-coronavirus-2019/situation-reports/?gclid=Cj0KCQjw2PP1BRCiARIsAEqv-pTBlRc57bUVrAh6-9j_hkakBVk_n_TkbXjtgjVBcVizs7h83yH7YUEaAoVHEALw_wcB
4. J. H. U. a. Medicine . (2020). COVID-19 Dashboard by the Center for Systems Science and Engineering (CSSE) at Johns Hopkins University (JHU) Available: https://coronavirus.jhu.edu/map.html
5. W. Wang et al., “Detection of SARS-CoV-2 in Different Types of Clinical Specimens,” (in eng), JAMA, 2020/03// 2020.