Sources
“Context of the Covid-19 Pandemic Situation” chapter sources
“COVID-19 Precautionary Behavior to Attend by” chapter sources
“FAQs on Various Key Issues Regarding Covid-19” chapter sources
https://en.wikipedia.org/wiki/Coronavirus_disease_2019
https://en.wikipedia.org/wiki/Pandemic
https://www.flattenthecurve.com
https://www.historyofvaccines.org/content/articles/vaccine-development-testing-and-regulation
https://www.tpi.it/cronaca/coronavirus-paziente-1-mattia-grave-perche-20200303558064
https://www.anxietycentre.com/anxiety/symptoms/anxiety-cough.shtml
(other sources are mentioned in document)