Lohanadan, K., A. N. A., and A. C. “A Retrospective Case Study of Laryngeal Edema Causing Airway Obstruction Immediately Post COVID-19 Vaccination”. International Journal of Otorhinolaryngology and Head and Neck Surgery, vol. 8, no. 1, Dec. 2021, pp. 1-4, doi:10.18203/issn.2454-5929.ijohns20214852.