1. World Health Organization. Coronavirus disease (COVID-19): Tobacco. May 25, 2022. Accessed October 15, 2022. https://www.who.int/news-room/questions-and-answers/item/coronavirus-disease-covid-19-tobacco
2. Smoking and COVID-19 outcomes: an observational and Mendelian randomisation study using the UK Biobank cohort
3. Comorbidity and its Impact on Patients with COVID-19
4. 28 states, UTs ban smokeless tobacco products, spitting due to coronavirus. The Economic Times. May 10, 2020. Accessed October 15, 2022. https://economictimes.indiatimes.com/news/politics-and-nation/28-states-uts-ban-smokeless-tobacco-products-spitting-due-to-coronavirus/articleshow/75657382.cms?from=mdr
5. ICMR appeals to people to not chew, spit tobacco products in public. Devdiscourse. April 4, 2020. Accessed October 15, 2022. https://www.devdiscourse.com/article/headlines/993152-icmr-appeals-to-people-to-not-chew-spit-tobacco-products-in-public