COVID-19 & Tobacco Use
Recent media coverage has focused on the potential for unique COVID-19 risks faced by smokers and vapers.
Some of these conclusions could not be supported by data, leading to public health inquiries focused on the following questions:
- Does smoking or vaping change the risk of contracting the COVID-19 disease caused by the virus?
- Does smoking or vaping create underlying vulnerabilities (e.g. pre-existing lung conditions) or resilience that make the disease more serious or lethal or less serious for those who do contract it?
- Does smoking or vaping change the way the disease is transmitted from person to person - does smoking or vaping make people more or less infectious?
- Does switching from smoking to vaping, or quitting completely, change the profile of the risks to the individual?
Answers to those questions will provide critical evidence necessary to inform policies and guide appropriate communications to current tobacco users.
We have identified approximately 100 publicly available studies on COVID-19 hospitalizations where smoking status is available to help address some of these questions.
Preliminary Publicly Available Studies on COVID-19 & Tobacco Use
Information updated as of 5/29/20. COVID-19 science is rapidly developing. Study conclusions may be limited due to non-peer reviewed status or limited sample size.
| Date | Title | Authors | Geography | Vaping Data |
|---|---|---|---|---|
| 5/26/2020 | Clinical characteristics of patients hospitalized with COVID-19 in Spain: results from the SEMI-COVID-19 Network. | JM Casas Rojo, JM Anton Santos, J Millan Nunez-Cortes, C Lumbreras Bermejo, JM Ramos Rincon, E Roy-Vallejo, A Artero Mora, F Arnalich Fernandez, JM Garcia Brunen, JA Vargas Nunez, SJ Freire Castro, L Manzano, I Perales Fraile, A Crestelo Vieitez, F Puchades, E Rodilla, MN Solis Marquinez, D Bonet Tur, MdP Fidalgo Moreno, EM Fonseca Aizpuru, FJ Carrasco Sanchez, E Rabadan Pejenaute, M Rubio-Rivas, JD Torres Pena, R Gomez Huelgas | Spain | No Data |
| 5/26/2020 | Risk of infection and hospitalization by Covid-19 in Mexico: a case-control study | J Berumen, M Schmulson, J Alegre, G Guerrero, G Olaiz, RM Wong-Chew, J Larriva-Sahd, C Cantu-Brito, A Ochoa-Guzman, A Garcilazo-Avila, C Gonzalez-Carballo, E Chiquete | Mexico | No Data |
| 5/25/2020 | Risk factors affecting COVID-19 case fatality rate: A quantitative analysis of top 50 affected countries | HP Goh, WI Mahari, NI Ahad, L Chaw, N Kifli, BH Goh, SF Yeoh, LC Ming | Multiple | No Data |
| 5/25/2020 | COVID-19 Outcomes in 4712 consecutively confirmed SARS-CoV2 cases in the city of Madrid. | S Heili-Frades | Spain | No Data |
| 5/23/2020 | Morbid Obesity as an Independent Risk Factor for COVID-19 Mortality in Hospitalized Patients Younger Than 50 | E Klang, G Kassim, S Soffer, R Freeman, MA Levin, DL Reich | USA | No Data |
| 5/23/2020 | Risk Factors for COVID-19 versus non-COVID-19 related in-hospital and community deaths by Local Authority District in Great Britain | SP Leighton, DJ Leighton, J Herron, R Upthegrove, J Cavanagh, G Gkoutos, B Cullen, PK Mallikarjun | United Kingdom | No Data |
| 5/22/2020 | Interim Analysis of Risk Factors for Severe Outcomes among a Cohort of Hospitalized Adults Identified through the U.S. Coronavirus Disease 2019 (COVID-19)-Associated Hospitalization Surveillance Network (COVID-NET) | L Kim | USA | No Data |
| 5/22/2020 | Comorbidities, clinical signs and symptoms, laboratory findings, imaging features, treatment strategies, and outcomes in adult and pediatric patients with COVID-19: A systematic review and meta-analysis | CR Jutzeler, L Bourguignon, CV Weis, B Tong, C Wong, B Rieck, H Pargger, S Tschudin-Sutter, A Egli, K Borgwardt, M Walter | Mostly China | No Data |
| 5/21/2020 | COVID-19: the key role of pulmonary capillary leakage. An observational cohort study | MA Wu, T Fossali, L Pandolfi, L Carsana, D Ottolina, V Frangipane, R Rech, A Tosoni, A Agarossi, C Cogliati, F Meloni, B Marchini, M Nebuloni, E Catena, R Colombo | Italy | No Data |
| 5/19/2020 | COVID-19: Counter-Intuitive Data on Smoking Prevalence and Therapeutic Implications for Nicotine | R Polosa, G Caci | No Data | |
| 5/18/2020 | Early Experience with COVD-19 Patients at Academic Hospital in Southwestern United States | R Shekhar, S Upadhyay, A Sheikh, J Atencio, D Kapuria | USA | No Data |
| 5/17/2020 | Evaluating the determinants of COVID-19 mortality: A cross-country study | J Squalli | No Data | |
| 5/16/2020 | Progression, recovery and fatality in patients with SARS-CoV-2 related pneumonia in Wuhan, China: a single-centered, retrospective, observational study | H Wang, Y Lu, Q Lv, X Wu, T Hu, K Wang, Y Liu, Y Hu, L Yu, H Fei, Z Ba, X Lin | China | No Data |
| 5/15/2020 | Two important controversial risk factors in SARS-CoV-2 infection: Obesity and smoking | AB Engin, ED Engin, A Engin | No Data | |
| 5/15/2020 | Severe obesity is associated with higher in-hospital mortality in a cohort of patients with COVID-19 in the Bronx, New York | L Palaiodimos, DG Kokkinidis, W Li, D Karamanis, J Ognibene, S Arora, WN Southern, CS Mantzoros | USA | No Data |
| 5/15/2020 | Risk factors for SARS-CoV-2 among patients in the Oxford Royal College of General Practitioners Research and Surveillance Centre primary care network: a cross-sectional study. | S de Lusignan, J Dorward, A Correa, N Jones, O Akinyemi, G Amirthalingam, N Andrews, R Byford, G Dabrera, A Elliot, J Ellis, F Ferreira, J Lopez Bernal, C Okusi, M Ramsay, J Sherlock, G Smith, J Williams, G Howsam, M Zambon, M Joy, FDR Hobbs | United Kingdom | No Data |
| 5/15/2020 | Clinical Characteristics, Risk Factors and Outcomes Among the First Consecutive 1,096 Patients Diagnosed with COVID-19: The Kuwait Experience | S Almazeedi, S Al Youha, MH Jamal, M Al-Haddad, A Al-Muhaini, F Al-Ghimlas, S Al-Sabah | Kuwait | No Data |
| 5/15/2020 | Non-white ethnicity, male sex, and higher body mass index, but not medications acting on the reninangiotensin system are associated with coronavirus disease 2019 (Covid-19) hospitalisation: Review of the first 669 cases from the UK Biobank | Z Raisi-Estabragh, C McCracken, M Ardissino, MS Bethell, J Cooper, C Cooper, NC Harvey, SE Petersen | United Kingdom | No Data |
| 5/14/2020 | Early estimation of the risk factors for hospitalisation and mortality by COVID-19 in Mexico | MF Carrillo-Vega, G Salinas-Escudero, C Garcia-Pena, LM Gutierrez-Robledo, L Parra-Rodriguez | Mexico | No Data |
| 5/14/2020 | Epidemiology, risk factors and clinical course of SARS-CoV-2 infected patients in a Swiss university hospital: an observational retrospective study | J Regina, M Papadimitriou-Olivgeris, R Burger, P Filippidis, J Tschopp, F Desgranges, B Viala, E Kampouri, L Rochat, D Haefliger, M Belkoniene, C Fidalgo, A Kritikos, K Jaton, L Senn, AP Bart, LJ Pagani, O Manuel, L Lhopitallier | Switzerland | No Data |
| 5/13/2020 | Lifestyle Risk Factors for Cardiovascular Disease in Relation to COVID-19 Hospitalization: A Community-Based Cohort Study of 387,109 Adults in UK | M Hamer, M Kivimaki, CR Gale, GD Batty | United Kingdom | No Data |
| 5/11/2020 | Tobacco Smoking and COVID-19 Pandemic: Old and New Issues. A Summary of the Evidence From the Scientific Literature | MS Cattaruzza, V Zagà, S Gallus, P D'Argenio, G Gorini | No Data | |
| 5/11/2020 | Health and Demographic Impact on COVID-19 Infection and Mortality in US Counties | Z Xie, D Li | USA | No Data |
| 5/11/2020 | Smoking and the risk of COVID-19 infection in the UK Biobank Prospective Study | ER Cho, AS Slutsky, P Jha | United Kingdom | No Data |
| 5/11/2020 | Characteristics of SARS-CoV-2 positive and complicated COVID-19 patient cohorts in Israel: A comparative analysis | C Yanover, B Mizrahi, N Kalkstein, K Marcus, P Akiva, Y Barer, V Shalev, G Chodick | Israel | No Data |
| 5/10/2020 | Smoking Prevalence is Low in Symptomatic Patients Admitted for COVID-19 | N Gaibazzi, D Tuttolomondo, A Guidorossi, A Botti, A Tedeschi, C Martini, M Mattioli | Italy | No Data |
| 5/9/2020 | Are Vapers More Susceptible to COVID-19 Infection? | D Li, DP Croft, DJ Ossip, Z Xie | USA | Yes |
| 5/8/2020 | Active smoking and severity of coronavirus disease 2019 (COVID-19): The use of significance testing leads to an erroneous conclusion. | E Lo, B Lasnier | No Data | |
| 5/8/2020 | Correlation between prevalence of tobacco smoking and risk and severity of COVID-19 at the national level in the European Union: an ecological study. | A Gonzalez-Marron, JM Martinez-Sanchez | European Union | No Data |
| 5/8/2020 | Ethnicity, comorbidity, socioeconomic status, and their associations with COVID-19 infection in England: a cohort analysis of UK Biobank data | A Prats-Uribe, R Paredes, D Prieto-Alhambra | United Kingdom | No Data |
| 5/8/2020 | Beyond Smoking Cessation: Investigating Medicinal Nicotine to Prevent and Treat COVID-19 | HA Tindle, PA Newhouse, MS Freiberg | No Data | |
| 5/6/2020 | Active Smoking Is Associated With Severity of Coronavirus Disease 2019 (COVID-19): An Update of a Meta-Analysis | FR Guo | China | No Data |
| 5/6/2020 | Clinical characteristics and fecal-oral transmission potential of patients with COVID-19 | S Wang, J Tu, Y Sheng | China | No Data |
| 5/6/2020 | 30-day mortality in patients hospitalized with COVID-19 during the first wave of the Italian epidemic: a prospective cohort study | A Giacomelli, AL Ridolfo, L Milazzo, L Oreni, D Bernacchia, M Siano, C Bonazzetti, M Schiuma, A Covizzi, M Passerini, M Piscaglia, M Coen, G Gubertini, G Rizzardini, C Cogliati, AM Brambilla, R Colombo, A Castelli, R Rech, A Riva, A Torre, L Meroni, S Rusconi, S Antinori, M Galli | Italy | No Data |
| 5/5/2020 | COVID-19, smoking, and inequalities: a cross-sectional survey of adults in the UK | SE Jackson, J Brown, L Shahab, A Steptoe, D Fancourt | United Kingdom | No Data |
| 5/5/2020 | Clinical and Genetic Characteristics of Covid-19 Patients from UK Biobank | DA Kolin, S Kulm, O Elemento | United Kingdom | No Data |
| 5/5/2020 | Risk Factors of the Severity of COVID-19: A Meta-Analysis | A Rahman, NJ Sathi | China | No Data |
| 5/5/2020 | Pre-Existing Characteristics Associated with Covid-19 Illness Severity | JE Ebinger, N Achamallah, Ji Achamallah, H Achamallah, BL Claggett, N Sun, P Botting, TT Nguyen, E Luong, EH Kim, E Park, Y Liu, R Rosenberry, Y Matusov, S Zhao, I Pedraza, T Zaman, M Thompson, K Raedschelders, AH Berg, JD Grein, PW Noble, SS Chugh, CN Bairey Merz, E Marban, JE Van Eyk, SD Solomon, CM Albert, P Chen, S Cheng | USA | No Data |
| 5/4/2020 | Analysis of hospitalized COVID-19 patients in the Mount Sinai Health System using electronic medical records (EMR) reveals important prognostic factors for improved clinical outcomes | Z Wang, AB Zheutlin, YH Kao, KL Ayers, SJ Gross, P Kovatch, S Nirenberg, AW Charney, GN Nadkarni, PF O'Reilly, AC Just, CR Horowitz, G Martin, AD Branch, BS Glicksberg, DS Charney, DL Reich, WK Oh, EE Schadt, R Chen, Li Chen L Chen | USA | No Data |
| 5/4/2020 | A national prospective cohort study of SARS/COV2 pandemic outcomes in the U.S.: The CHASING COVID Cohort | M Robertson, S Kulkarni, A Berry, C Mirzayi, AR Maroko, R Zimba, D Westmoreland, C Grov, A Parcesepe, L Waldron, D Nash | USA | No Data |
| 5/4/2020 | A cohort of patients with COVID-19 in a major teaching hospital in Europe | AM Borobia, AJ Carcas, F Arnalich, R Alvarez-Sala, J Montserrat, M Quintana, JC Figueira, RM Torres Santos-Olmo, J Garcia-Rodriguez, A Martin-Vega, E Ramirez, A Buno, G Martinez-Ales, N Garcia-Arenzana, M Marti de Gracia, F Moreno, F Reinoso-Barbero, A Martin-Quiros, A Rivera, J Mingorance, CC Carpio, D Prieto Arribas, E Rey Cuevas, M Prados, C Prados, JJ Rios, M Hernan, J Frias, J Arribas, R Arribas | Spain | No Data |
| 5/2/2020 | Modifiable and non-modifiable risk factors for COVID-19: results from UK Biobank | FK Ho, CA Celis-Morales, SR Gray, SV Katikireddi, CL Niedzwiedz, C Hastie, DM Lyall, DL Ferguson, C Berry, DF Mackay, J Gill, M Gill, R Gill, JP Pell, N Sattar, PI Welsh | United Kingdom | No Data |
| 5/1/2020 | COVID-19 severe pneumonia in Mexico City - First experience in a Mexican hospital | B Valente-Acosta, I Hoyo-Ulloa, L Espinosa-Aguilar, R Mendoza-Aguilar, J Garcia-Guerrero, D Ontanon-Zurita, B Gomez-Gomez, O Fueyo-Rodriguez, JM Vera-Zertuche, R Anzola-Arias, JV Jimenez-Ceja, D Horta-Capinteyro, C Olvera-Guzman, J Aguirre-Sanchez, J Franco-Granillo, L Jauregui-Camargo, E Sada-Diaz, R Saavedra-Perez-Salas, A Palomar-Lever, F Moreno-Sanchez | Mexico | No Data |
| 4/29/2020 | Current Smoking Is Not Associated With COVID-19 | M Rossato, L Russo, S Mazzocut, A Di Vincenzo, P Fioretto, R Vettor | Italy | No Data |
| 4/28/2020 | Features of 16,749 hospitalised UK patients with COVID-19 using the ISARIC WHO Clinical Characterisation Protocol | AB Docherty, EM Harrison, CA Green, HE Hardwick, R Pius, L Norman, KA Holden, JM Read, F Dondelinger, G Carson, L Merson, J Lee, D Plotkin, L Sigfrid, S Halpin, C Jackson, C Gamble, PW Horby, JS Nguyen-Van-Tam, J Dunning, PJ Openshaw, JK Baillie, MG Semple | United Kingdom | No Data |
| 4/27/2020 | Association Between Clinical Manifestations and Prognosis in Patients With COVID-19 | Y Tao, C Shaohang, Z Zhidan, C Xuejuan, L Yuanyuan, Y Sichun, J Peng, X Xuwen | China | No Data |
| 4/25/2020 | COVID-19 Fatality and Comorbidity Risk Factors among Confirmed Patients in Mexico | P Solis, H Carreno | Mexico | No Data |
| 4/23/2020 | Systematic review of the prevalence of current smoking among hospitalized COVID‑19 patients in China: could nicotine be a therapeutic option? | K Farsalinos, A Barbouni, R Niaura | China | No Data |
| 4/23/2020 | Risk factors of critical & mortal COVID-19 cases: A systematic literature review and meta-analysis. | Z Zheng, F Peng, B Xu, J Zhao, H Liu, J Peng, Q Li, C Jiang, Y Zhou, S Liu, C Ye, P Zhang, Y Xing, H Guo, W Tang | China | No Data |
| 4/23/2020 | Smoking habit and hospitalization for severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2)-related pneumonia: The unsolved paradox behind the evidence. | G Garufi, L Carbognin, A Orlandi, G Tortora, E Bria | China | No Data |
| 4/23/2020 | Clinical Characteristics of 20,662 Patients with COVID-19 in mainland China: A Systemic Review and Meta-analysis | C Tang, K Zhang, W Wang, Z Pei, Z Liu, P Yuan, Z Guan, J Gu | China | No Data |
| 4/20/2020 | Epidemiology, clinical course, and outcomes of critically ill adults with COVID-19 in New York City: a prospective cohort study | MJ Cummings, MR Baldwin, D Abrams, SD Jacobson, BJ Meyer, EM Balough, JG Aaron, J Claassen, LE Rabbani, J Hastie, BR Hochman, J Salazar-Schicchi, NH Yip, D Brodie, MR O'Donnell | USA | No Data |
| 4/20/2020 | Low Incidence of Daily Active Tobacco Smoking in Patients with Symptomatic COVID-19 | M Miyara, F Tubach, V Pourcher, C Morelot-Panzini, J Pernet, J Haroche, S Lebbah, E Morawiec, G Gorochov, E Caumes, P Hausfater, A Combes, T Similowski, Z Amoura | France | No Data |
| 4/17/2020 | Obesity as a Risk Factor for Greater Severity of COVID-19 in Patients With Metabolic Associated Fatty Liver Disease | KI Zheng, F Gao, X Wang, Q Sun, K Pan, T Wang, H Ma, W Liu, J George, M Zheng | China | No Data |
| 4/16/2020 | Smoking is Associated with COVID-19 Progression: A Meta-Analysis | R Patanavanich, SA Glantz | No Data | |
| 4/15/2020 | The Impact of COPD and Smoking History on the Severity of Covid-19: A Systemic Review and Meta-Analysis | Q Zhao, M Meng, R Kumar, Y Wu, J Huang, N Lian, Y Deng, S Lin | China | No Data |
| 4/15/2020 | Covid-19 Testing, Hospital Admission, and Intensive Care Among 2,026,227 United States Veterans Aged 54-75 Years | CT Rentsch, F Kidwai-Khan, JP Tate, LS Park, JT King Jr., M Skanderson, RG Hauser, A Schultze, CI Jarvis, M Holodniy, V Lo Re III, KM Akgun, K Crothers, TH Taddei, MS Freiberg, AC Justice | USA | No Data |
| 4/15/2020 | Associations of clinical characteristics and antiviral drugs with viral RNA clearance in patients with COVID-19 in Guangzhou, China: a retrospective cohort study | X Chen, Y Zhang, B Zhu, J Zeng, W Hong, X He, J Chen, H Zheng, S Qiu, Y Deng, J Chan, J Wang | China | No Data |
| 4/13/2020 | Factors associated with hospitalization and critical illness among 4,103 patients with COVID-19 disease in New York City | CM Petrilli, SA Jones, J Yang, H Rajagopalan, LF O'Donnell, Y Chernyak, K Tobin, RJ Cerfolio, F Francois, LI Horwitz | USA | No Data |
| 4/13/2020 | Key to successful treatment of COVID-19: accurate identification of severe risks and early intervention of disease progression | M Chen, C Tu, C Tan, X Zheng, X Wang, J Wu, Y Huang, Z Wang, Y Yan, Z Li, H Shan, J Liu, J Huang | China | No Data |
| 4/13/2020 | The characteristics of 50 hospitalized COVID-19 patients with and without ARDS | M Dreher, A Kersten, J Bickenbach, P Balfanz, B Hartmann, C Cornelissen, A Daher, R Stöhr, M Kleines, SW Lemmen, JC Brokmann, T Müller, D Müller-Wieland, G Marx, N Marx | Germany | No Data |
| 4/10/2020 | Clinical and epidemiological characteristics of Coronavirus Disease 2019 (COVID-19) patients | SC Tan | Primarily China | No Data |
| 4/10/2020 | The relationship of COVID-19 severity with cardiovascular disease and its traditional risk factors: A systematic review and meta-analysis | K Matsushita, N Ding, M Kou, X Hu, M Chen, Y Gao, Y Honda, D Dowdy, Y Mok, J Ishigami, LJ Appel | China | No Data |
| 4/10/2020 | Case fatality rate in COVID-19: a systematic review and meta-analysis | CN Kahathuduwa, CS Dhanasekara, S-H Chin | China | No Data |
| 4/9/2020 | COVID-19 and smoking | I Berlin, D Thomas, A-L Le Faou, J Cornuz | China | No Data |
| 4/9/2020 | Correction to Sex difference and smoking predisposition in patients with COVID-19 | No Data | ||
| 4/8/2020 | Collision of the COVID-19 and Addiction Epidemics | ND Volkow | Global | No Data |
| 4/6/2020 | Virologic and clinical characteristics for prognosis of severe COVID-19: a retrospective observational study in Wuhan, China | S Fu, X Fu, Y Song, M Li, P-h Pan, T Tang, C Zhang, T Jiang, D Tan, X Fan, X Sha, J Ma, Y Huang, S Li, Y Zheng, Z Qian, Z Xiong, L Xiao, H Long, J Chen, Y Ouyang | China | No Data |
| 4/2/2020 | Smoking and COVID-19: Rapid evidence review for the Royal College of Physicians, London (UK) | D Simons, J Brown, L Shahab, O Perski | China | No Data |
| 4/1/2020 | The COVID-19 infection in Italy: a statistical study of an abnormally severe disease | G De Natale, V Ricciardi, G De Luca, D De Natale, G Di Meglio, A Ferragamo, V Marchitelli, A Piccolo, A Scala, R Somma, E Spina, C Troise | Italy | No Data |
| 4/1/2020 | Risk factors for severe corona virus disease 2019 (COVID-19) patients : a systematic review and meta analysis | L Xu, M Yaqian, Gang Chen | China | No Data |
| 4/1/2020 | Preliminary Estimates of the Prevalence of Selected Underlying Health Conditions Among Patients with Coronavirus Disease 2019 — United States, February 12–March 28, 2020 | Centers for Disease Control and Prevention; N Chow, K Fleming-Dutra, R Gierke, A Hall, M Hughes, T Pilishvili, M Ritchey, K Roguski, T Skoff, E Ussery | USA | No Data |
| 3/31/2020 | Comorbidity and its impact on 1,590 patients with COVID-19 in China: A Nationwide Analysis | W-j Guan, W-h Liang, Y Zhao, H-r Liang, Z-s Chen, Y-m Li, X-q Liu, R-c Chen, C-l Tang, T Wang, C-q Ou, L Li, P-y Chen, L Sang, W Wang, J-f Li, C-c Li, L-m Ou, B Cheng, S Xiong, Z-y Ni, Y Hu, J Xiang, L Liu, H Shan, C-l Lei, Y-x Peng, L Wei, Y Liu, Y-h Hu, P Peng, J-m Wang, J-y Liu, Z Chen, G Li, Z-j Zheng, S-q Qiu, J Luo, C-j Ye, S-y Zhu, L-l Cheng, F Ye, S-y Li, J-p Zheng, N-f Zhang, N-s Zhong, J-x He | China | No Data |
| 3/31/2020 | Is nicotine exposure linked to cardiopulmonary vulnerability to COVID-19 in the general population? | J Olds, N Kabbani | China | No Data |
| 3/31/2020 | Smokeless tobacco use and the COVID-19 pandemic | A Singh, P Chaturvedi | India | No Data |
| 3/30/2020 | Factors associated with prolonged viral shedding and impact of Lopinavir/Ritonavir treatment in patients with SARS-CoV-2 infection | D Yan, X-y Liu, Y-n Zhu, L Huang, B-t Dan, G-j Zhang, Y-h Gao | China | No Data |
| 3/30/2020 | Radiographic Findings and other Predictors in Adults with Covid-19 | K Li, D Chen, S Chen, Y Feng, C Chang, Z Wang, N Wang, G Zhen | China | No Data |
| 3/30/2020 | "VAPING AND SARS-CoV-2 AND COVID-19 TECHNICAL INFORMATION FOR VAPERS" | R Sussman, C Escrig | No Data | |
| 3/30/2020 | Case-Fatality Rate and Characteristics of Patients Dying in Relation to COVID-19 in Italy | G Onder, G Rezza, S Brusaferro | No Data | |
| 3/27/2020 | Prevalence, Severity and Mortality associated with COPD and Smoking in patients with COVID-19: A Rapid Systematic Review and Meta-Analysis | JS Alqahtani, T Oyelade, AM Aldhahir, SM Alghamdi, M Almehmadi, AS Alqahtani, S Quaderi, S Mandal, J Hurst | Primarily China | No Data |
| 3/26/2020 | Risk Factors Associated with Clinical Outcomes in 323 COVID-19 Patients in Wuhan, China | L Hu, S Chen, Y Fu, Z Gao, H Long, H-w Ren, Y Zuo, H Li, J Wang, Q-b Xv, W-x Yu, J Liu, C Shao, J-j Hao, C-z Wang, Y Ma, Z Wang, R Yanagihara, J-m Wang, Y Deng | China | No Data |
| 3/25/2020 | Smoking, vaping and hospitalization for COVID-19 | K Farsalinos, A Barbouni, R Niaura | China | No Data |
| 3/24/2020 | Epidemiological and clinical features of 125 Hospitalized Patients with COVID-19 in Fuyang, Anhui, China | R Wang, M Pan, X Zhang, X Fan, M Han, F Zhao, M Miao, J Xu, M Guan, X Deng, X Chen, L Shen | China | No Data |
| 3/24/2020 | Prevalence of Underlying Diseases in Hospitalized Patients With COVID-19: A Systematic Review and Meta-Analysis | A Emami, F Javanmardi, N Pirbonyeh, A Akbari | China | No Data |
| 3/24/2020 | COVID-19 clinical characteristics, and sex-specific risk of mortality: Systematic Review and Meta-analysis | MJ Nasiri, S Haddadi, A Tahvildari, Y Farsi, M Arbabi, S Hasanzadeh, P Jamshidi, M Murthi, M Mirsaeidi | China | No Data |
| 3/24/2020 | A comparative multi-centre study on the clinical and imaging features of comfirmed and uncomfirmed patients with COVID-19 | C Miao, J Zhuang, M Jin, H Xiong, P Huang, Q Zhao, L Miao, J Du, X Yang, P Huang, J Hong | China | No Data |
| 3/20/2020 | COVID-19 and Smoking: A Systematic Review of the Evidence | C Vardavas, K Nikitara | China | No Data |
| 3/20/2020 | Incidence, clinical characteristics and prognostic factor of patients with COVID-19: a systematic review and meta-analysis | X Zhao, B Zhang, P Li, C Ma, J Gu, P Hou, Z Guo, H Wu, Y Bai | China | No Data |
| 3/16/2020 | Clinical characteristics of refractory COVID-19 pneumonia in Wuhan, China | P Mo, Y Xing, Y Xiao, L Deng, Q Zhao, H Wang, Y Xiong, Z Cheng, S Gao, K Liang, M Luo, T Chen, S Song, Z Ma, X Chen, R Zheng, Q Cao, F Wang, Y Zhang | China | No Data |
| 3/13/2020 | Initial clinical features of suspected Coronavirus Disease 2019 in two emergency departments outside of Hubei, China. Journal of Medical Virology | W Zhu, K Xie, H Lu, L Xu, S Zhou, S Fang | China | No Data |
| 3/12/2020 | Active Smoking Is Not Associated With Severity of Coronavirus Disease 2019 (COVID-19) | G Lippi, BM Henry | China | No Data |
| 3/12/2020 | Clinical course and risk factors for mortality of adult inpatients with COVID-19 in Wuhan, China: a retrospective cohort study | F Zhou, T Yu, R Du, G Fan, Y Liu, Z Liu, J Xiang, Y Wang, B Song, X Gu, L Guan, Y Wei, H Li, X Wu, J Xu, S Tu, Y Zhang, H Chen, B Cao | China | No Data |
| 3/12/2020 | Epidemiological and clinical characteristics of COVID-19 in adolescents and young adults | J Liao, S Fan, J Chen, J Wu, S Xu, Y Guo, C Li, X Zhang, C Wu, H Mou, C Song, F Li, G Wu, J Zhang, L Guo, H Liu, J Lv, L Xu, C Lang | China | No Data |
| 3/11/2020 | Sex difference and smoking predisposition in patients with COVID-19 | H Cai | China | No Data |
| 3/10/2020 | Clinical Characteristics of SARS-CoV-2 Pneumonia Compared to Controls in Chinese Han Population | Y Xu, Y-r Li, Q Zeng, Z-b Lu, Y-z Li, W Wu, S-y Dong, G Huang, X-h Wang | China | No Data |
| 3/10/2020 | Clinical Characteristics of Coronavirus Pneumonia 2019 (COVID-19): An Updated Systematic Review | Z Fang, F Yi, K Wu, K Lai, X Sun, N Zhong, Z Liu | China | No Data |
| 2/28/2020 | Analysis of factors associated with disease outcomes in hospitalized patients with 2019 novel coronavirus disease. | W Liu, Z-w Tao, W Lei, Y Ming-Li, L Kui, Z Ling, W Shuang, D Yan, L Jing, H-g Liu, Y Ming, H Yi | China | No Data |
| 2/28/2020 | Clinical Characteristics of Coronavirus Disease 2019 in China | W-j Guan, Z-y Ni, Y Hu, W-h Liang, C-q Ou, J-x He, L Liu, H Shan, C-l Lei, D Hui, B Du, L-j Li, et al. | China | No Data |
| 2/24/2020 | Clinical features of patients infected with 2019 novel coronavirus in Wuhan, China | C Huang, Y Wang, X Li, L Ren, J Zhao, Y Hu, L Zhang, G Fan, J Xu, X Gu, Z Cheng, T Yu, J Xia, Y Wei, W Wu, X Xie, W Yin, H Li,M Liu, Y Xiao, H Gao, L Guo, J Xie, G Wang, R Jiang, Z Gao, Q Jin, J Wang, B Cao | China | No Data |
| 2/21/2020 | Chest CT Findings in Patients With Coronavirus Disease 2019 and Its Relationship With Clinical Features | J Wu, X Wu, W Zeng, D Guo, Z Fang, L Chen, H Huang, C Li | China | No Data |
| 2/21/2020 | Clinical course and outcomes of critically ill patients with SARS-CoV-2 pneumonia in Wuhan, China: a single-centered, retrospective, observational study | X Yang, Y Yu, J Xu, H Shu, J Xia, H Liu, Y Wu, L Zhang, Z Yu, M Fang, T Yu, Y Wang, S Pan, X Zou, S Yuan, Y Shang | China | No Data |
| 2/19/2020 | Clinical characteristics of 140 patients infected with SARS-CoV-2 in Wuhan, China | J-j Zhang, X Dong, Y-y Cao, Y-d Yuan, Y-b Yang, Y-q Yan, CA Akdis, Y-d Gao | China | No Data |