1. World Health Organization. WHO Coronavirus (Covid-19) Dashboard. WHO, 2022. Retrieved from https://covid19.who.int/. [Last accessed on 14 Jun 2022].
2. Okereke C, Nielsen K The problem with predicting coronavirus apocalypse in Africa. Aljazeera.com, 2020. Retrieved from https://www.aljazeera.com/opinions/2020/5/7/the-problem-with-predicting-coronavirus-apocalypse-in-africa. [Last accessed on 14 Jun 2022].
3. World Health Organization. Global Health and Aging. WHO, 2011. Retrieved from https://www.who.int/ageing/publications/global_health.pdf [Last accessed on 7 Jul 2021].
4. World Health Organization. Ageing and health. WHO, 2018. Retrieved from https://www.who.int/news-room/fact-sheets/detail/ageing-and-health. [Last accessed on 17 Feb 2021].
5. Beard JR, Biggs S, Bloom DE, Fried LP, Hogan P, Kalache A, et al. Global Population Ageing: Peril or Promise. Geneva: World Economic Forum; 2012. Retrieved from https://demographic-challenge.com/files/downloads/6c59e8722eec82f7ffa0f1158d0f4e59/ageingbook_010612.pdf [Last accessed on 19 Jun 2021]