References
  1. https://www.who.int/emergencies/diseases/novel-coronavirus-2019/question-and-answers-hub/q-a-detail/q-a-on-on-covid-19-for-older-people
  2. Wee S.-L, Wang V 2020 https://www.nytimes.com/interactive/2020/03/13/world/asia/coronavirus-death-life.html
  3. https://www.abc.net.au/news/2020-04-23/coronavirus-test-positive-second-time-how-long-virus-lasts/12175972
  4. https://www.rki.de/SharedDocs/FAQ/NCOV2019/gesamt.html