1. Wardhani DK, Susan S. Adaptation of Indoor Health and Comfort Criteria to Mitigate Covid-19 Transmission in the Workplace. Humaniora. 2021 Mar 30;12(1):29–38. 2. Anchordoqui LA, Chudnovsky EM. A Physicist View of COVID-19 Airborne Infection through Convective Airflow in Indoor Spaces. SciMedicine J. 2020 Aug 28;2:68–72. 3. Sodiq A, Khan MA, Naas M, Amhamed A. Addressing COVID-19 contagion through the HVAC systems by reviewing indoor airborne nature of infectious microbes: Will an innovative air recirculation concept provide a practical solution? Environ Res. 2021 Aug;199:111329. 4. Noorimotlagh Z, Jaafarzadeh N, Martínez SS, Mirzaee SA. A systematic review of possible airborne transmission of the COVID-19 virus (SARS-CoV-2) in the indoor air environment. Environ Res. 2021 Feb;193:110612. 5. Bazant MZ, Kodio O, Cohen AE, Khan K, Gu Z, Bush JWM. Monitoring carbon dioxide to quantify the risk of indoor airborne transmission of COVID-19 [Internet]. Epidemiology; 2021 Apr [cited 2021 Sep 23]. Available from: http://medrxiv.org/lookup/doi/10.1101/2021.04.04.21254903 6. OECD. Regulatory quality and COVID-19: The use of regulatory management tools in a time of crisis [Internet]. 2020 Sep [cited 2021 Sep 23]. (OECD Policy Responses to Coronavirus (COVID-19)). Available from: https://www.oecd-ilibrary.org/social-issues-migration-health/regulatory-qualityand-covid-19-the-use-of-regulatory-management-tools-in-a-time-of-crisis_b876d5dc-en 7. OECD. The long-term environmental implications of COVID-19 [Internet]. OECD. 2020 [cited 2021 Aug 12]. Available from: https://www.oecd.org/coronavirus/policy-responses/the-long-termenvironmental-implications-of-covid-19-4b7a9937/ 8. Scotford EAK. Rethinking Clean Air: Air Quality Law and COVID-19. SSRN Electron J [Internet]. 2020 [cited 2021 Sep 23]; Available from: https://www.ssrn.com/abstract=3754301 9. Lewis D. Why indoor spaces are still prime COVID hotspots. Nature. 2021 Apr 1;592(7852):22–5. 10. Awada M, Becerik-Gerber B, Hoque S, O’Neill Z, Pedrielli G, Wen J, et al. Ten questions concerning occupant health in buildings during normal operations and extreme events including the COVID-19 pandemic. Build Environ. 2021 Jan;188:107480. 11. Agarwal N, Meena CS, Raj BP, Saini L, Kumar A, Gopalakrishnan N, et al. Indoor air quality improvement in COVID-19 pandemic: Review. Sustain Cities Soc. 2021 Jul;70:102942. 12. Atkinson J, Chartier Y, Pessoa-Silva CL, Jensen P, Li Y, Seto W-H, editors. Natural Ventilation for Infection Control in Health-Care Settings [Internet]. Geneva: World Health Organization; 2009 [cited 2021 Sep 23]. (WHO Guidelines Approved by the Guidelines Review Committee). Available from: http://www.ncbi.nlm.nih.gov/books/NBK143284/ 13. Chen C-Y, Chen P-H, Chen J-K, Su T-C. Recommendations for ventilation of indoor spaces to reduce COVID-19 transmission. J Formos Med Assoc. 2021 Aug;S092966462100365X. 14. ASHRAE Resources Available to Address COVID-19 Concerns [Internet]. [cited 2021 Aug 12]. Available from: https://www.ashrae.org/about/news/2020/ashrae-resources-available-to-addresscovid-19-concerns 15. REHVA [Internet]. Federation of European Heating, Ventilation and Air Conditioning. 2021 [cited 2021 Sep 23]. Available from: https://www.rehva.eu/about-us/who-we-are/about-rehva 16. Azuma K, Yanagi U, Kagi N, Kim H, Ogata M, Hayashi M. Environmental factors involved in SARSCoV-2 transmission: effect and role of indoor environmental quality in the strategy for COVID-19 infection control. Environ Health Prev Med. 2020 Dec;25(1):66. 17. Dolgikh S. Covid-19 Transmission: Environmental Approach to Effective Control in Closed Indoor Environments [Internet]. Life Sciences; 2020 Nov [cited 2021 Sep 23]. Available from: https://www.cambridge.org/engage/coe/article-details/5f9f2cb33e150600123faa08 18. Lakhouit A, Hachimi H, El Mokhi C, Addaim A, Kaicer M. Study the Impact of Engineering Ventilation on Indoor Air Quality in Hospitals during COVID-19. Asian J Atmospheric Environ. 2021;1–14. 19. Liu L, Zhou H, Lin B, Yu J. Real-time monitoring and controlling strategies of indoor environment in the frontline hospitals during COVID-19 pandemic. Chin Sci Bull. 2021 Apr 1;66(4–5):424–32.