1. World Health Organization. Origin of SARS-CoV-2 [Internet]. [cited 2022 Aug 13]. https://apps.who.int/iris/bitstream/handle/10665/332197/WHO-2019-nCoV-FAQ-Virus_origin-2020.1-eng.pdf
2. World Health Organization WHO Coronavirus (COVID-19) Dashboard [Internet]. [cited 2023 August 7]. https://covid19.who.int/
3. National Health Service. Symptoms of coronavirus (COVID-19) [Internet]. [cited 2022 Aug 13]. https://www.nhs.uk/conditions/coronavirus-covid-19/symptoms/main-symptoms/
4. National Health Service. Long-term effects of coronavirus (long COVID) [Internet]. [cited 2022 Aug 13]. https://www.nhs.uk/conditions/coronavirus-covid-19/long-term-effects-of-coronavirus-long-covid/
5. Global prevalence of post-coronavirus disease 2019 (COVID-19) condition or long COVID: a meta-analysis and systematic review;C Chen;J Infect Dis,2022