1. Coronavirus disease (covid-2019). https://www.who.int/health-topics/coronavirus#tab=tab_1
2. Post-Covid conditions (Long Covid). https://www.who.int/srilanka/news/detail/16-10-2021-post-covid-19-condition
3. Episode 47, Post-Covid conditions. https://www.who.int/emergencies/diseases/novel-coronavirus-2019/media-resources/science-in-5/episode-47---post-covid-19-condition
4. Post-Covid conditions. https://www.who.int/srilanka/news/detail/16-10-2021-post-covid-19-condition
5. Episode 46, diabetes and covid-19. https://www.who.int/emergencies/diseases/novel-coronavirus-2019/media-resources/science-in-5/episode-46---diabetes-covid-19