Update: Characteristics of Patients in a National Outbreak of E-cigarette, or Vaping, Product Use–Associated Lung Injuries — United States, October 2019
1National Center for Environmental Health, CDC; 2National Center for Chronic Disease Prevention and Health Promotion, CDC; 3National Center for Injury Prevention and Control, CDC; 4National Center on Birth Defects and Developmental Disabilities, CDC; 5Epidemic Intelligence Service, CDC; 6National Center for HIV/AIDS, Viral Hepatitis, STD, and TB Prevention, CDC; 7Center for Surveillance, Epidemiology, and Laboratory Services, CDC; 8National Center for Emerging and Zoonotic Infectious Diseases, CDC; 9National Institute for Occupational Safety and Health, CDC; 10National Center for Immunization and Respiratory Disease, CDC.
National Center for Immunization and Respiratory Diseases, CDC
Center for Surveillance, Epidemiology, and Laboratory Services, CDC
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California Department of Public Health
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Epidemic Intelligence Service, National Center for Injury Prevention and Control, CDC
Epidemic Intelligence Service, National Center for Injury Prevention and Control, CDC
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National Center for Chronic Disease Prevention and Health Promotion, CDC
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Epidemic Intelligence Service, National Center for Environmental, CDC
Epidemic Intelligence Service, National Center for Immunization and Respiratory Diseases, CDC
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Epidemic Intelligence Service, National Center for Chronic Disease Prevention and Health Promotion, CDC
Epidemic Intelligence Service, National Center for Chronic Disease Prevention and Health Promotion, CDC
National Center for Chronic Disease Prevention and Health Promotion, CDC
National Center for Chronic Disease Prevention and Health Promotion, CDC
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Utah Department of Health
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Illinois Department of Health
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Council of State and Territorial Epidemiologists
National Center for Environmental Health, CDC
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California Department of Public Health
Mercer University
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Center for Surveillance, Epidemiology, and Laboratory Services, CDC
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North Carolina Department of Health and Human Services
Center for Surveillance, Epidemiology, and Laboratory Services, CDC
National Center for Chronic Disease Prevention and Health Promotion, CDC
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Epidemic Intelligence Service, National Institute for Occupational Safety and Health
National Center for Injury Prevention and Control, CDC
California Department of Public Health
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Collection date 2019 Nov 1.
On October 28, 2019, this report was posted as an MMWR Early Release on the MMWR website (https://www.cdc.gov/mmwr).
CDC, the Food and Drug Administration, state and local health departments, and other public health and clinical stakeholders are investigating a national outbreak of electronic-cigarette (e-cigarette), or vaping, product use–associated lung injury (EVALI) (1). As of October 22, 2019, 49 states, the District of Columbia (DC), and the U.S. Virgin Islands have reported 1,604 cases of EVALI to CDC, including 34 (2.1%) EVALI-associated deaths in 24 states. Based on data collected as of October 15, 2019, this report updates data on patient characteristics and substances used in e-cigarette, or vaping, products (2) and describes characteristics of EVALI-associated deaths. The median age of EVALI patients who survived was 23 years, and the median age of EVALI patients who died was 45 years. Among 867 (54%) EVALI patients with available data on use of specific e-cigarette, or vaping, products in the 3 months preceding symptom onset, 86% reported any use of tetrahydrocannabinol (THC)-containing products, 64% reported any use of nicotine-containing products, and 52% reported use of both. Exclusive use of THC-containing products was reported by 34% of patients and exclusive use of nicotine-containing products by 11%, and for 2% of patients, no use of either THC- or nicotine-containing products was reported. Among 19 EVALI patients who died and for whom substance use data were available, 84% reported any use of THC-containing products, including 63% who reported exclusive use of THC-containing products; 37% reported any use of nicotine-containing products, including 16% who reported exclusive use of nicotine-containing products. To date, no single compound or ingredient used in e-cigarette, or vaping, products has emerged as the cause of EVALI, and there might be more than one cause. Because most patients reported using THC-containing products before symptom onset, CDC recommends that persons should not use e-cigarette, or vaping, products that contain THC. In addition, because the specific compound or ingredient causing lung injury is not yet known, and while the investigation continues, persons should consider refraining from the use of all e-cigarette, or vaping, products.
State health departments, the Council of State and Territorial Epidemiologists Vaping Associated Pulmonary Injury Epidemiology Task Force, and CDC developed and disseminated surveillance case definitions* and data collection tools (i.e., patient interview and medical record abstraction forms) to monitor and track cases beginning in August 2019. Some states are using these tools, whereas others elected to use state-specific tools. States and jurisdictions routinely report the number of confirmed and probable EVALI cases to CDC on a voluntary basis and, when available, include data from medical record abstractions and patient interviews. Proxies (e.g., spouses or parents) were interviewed if patients were too ill or if they had died. Most states and jurisdictions report the number of cases to CDC as case status is determined; however, it can take up to several weeks to complete and submit information from interview and medical record abstraction. This report provides updated data on patient demographic characteristics; substances used in e-cigarette, or vaping, products; and characteristics of EVALI patients who died, based on cases reported to CDC with available interview and medical record abstraction data as of October 15, 2019. The median ages of patients were compared across groups using the Wilcoxon rank-sum test. SAS statistical software (version 9.4; SAS Institute) was used for the analysis.
As of October 22, 2019, 49 states, DC, and the U.S. Virgin Islands had reported 1,604 cases of EVALI to CDC, including 34 (2.1%) EVALI-associated deaths in 24 states. Among 1,378 patients with confirmed or probable EVALI reported to CDC by October 15, 2019, with available data, 964 (70%) were male (Table). No cases in pregnant women were reported. Among 1,364 patients with information on age, the median age was 24 years (range = 13–75 years) and was similar among males (23 years) and females (25 years); 737 (54%) patients were aged <25 years, and 1,081 (79%) were aged <35 years. Among 383 EVALI patients with available information on race/ethnicity, 298 (78%) were non-Hispanic white, and 62 (16%) were Hispanic. Among 867 patients with available data on substances used, 749 (86%) reported any use of THC-containing products, and 552 (64%) reported any use of nicotine-containing products in the 3 months preceding symptom onset; 455 patients (52%) reported use of both THC-containing products and nicotine-containing products, 294 (34%) reported exclusive use of THC-containing products, and 97 (11%) reported exclusive use of nicotine-containing products. Twenty-one (2%) patients reported no use of THC- or nicotine-containing products.
| Characteristic | No. /Total No. (%†) | ||
|---|---|---|---|
| EVALI patients who survived | EVALI–associated deaths | All EVALI patients | |
| Sex | |||
| Male | 947/1,349 (70) | 17/29 (59) | 964/1,378 (70) |
| Female | 402/1,349 (30) | 12/29 (41) | 414/1,378 (30) |
| Age group (yrs) | |||
| 13–17 | 735/1,335 (55)§ | 2/29 (7)§ | 196/1,364 (14) |
| 18–24 | 541/1,364 (40) | ||
| 25–34 | 339/1,335 (25) | 5/29 (17) | 344/1,364 (25) |
| 35–44 | 165/1,335 (12) | 7/29 (24) | 172/1,364 (13) |
| 45–64 | 79/1,335 (6) | 8/29 (28) | 87/1,364 (6) |
| 65–75 | 17/1,335 (1) | 7/29 (24) | 24/1,364 (2) |
| Median age, yrs (range) | |||
| Overall | 23 (13–72) | 45 (17–75) | 24 (13–75) |
| Male | 23 (13–68) | 55 (17–71) | 23 (13–71) |
| Female | 25 (13–72) | 43 (27–75) | 25 (13–75) |
| Race/Ethnicity¶ | |||
| White | 283/365 (78) | 15/18 (83) | 298/383 (78) |
| Black or African American | 22/365 (6)** | 1/18 (6)** | 9/383 (2) |
| American Indian or Alaska Native | 4/383 (1) | ||
| Asian, Native Hawaiian, or other Pacific Islander | 5/383 (1) | ||
| Other | 5/383 (1) | ||
| Hispanic | 60/365 (16) | 2/18 (11) | 62/383 (16) |
| Substances used in e-cigarette, or vaping, products ††,§§ | |||
| THC-containing products, any use | 733/848 (86) | 16/19 (84) | 749/867 (86) |
| Nicotine-containing products, any use | 545/848 (64) | 7/19 (37) | 552/867 (64) |
| Both THC- and nicotine-containing products, any use | 451/848 (53) | 4/19 (21) | 455/867 (52) |
| THC-containing products, exclusive use | 282/848 (33) | 12/19 (63) | 294/867 (34) |
| Nicotine-containing products, exclusive use | 94/848 (11) | 3/19 (16) | 97/867 (11) |
| No THC- or nicotine-containing products reported | 21/848 (2) | 0/19 (0) | 21/867 (2) |
Among the 29 EVALI-associated deaths reported to CDC as of October 15, 2019, 59% (17) were male; the median age was 45 years (range = 17–75 years) overall (Table), 55 years (range = 17–71 years) among males, and 43 years (range = 27–75 years) among females; the age difference between males and females was not statistically significant (p = 0.5). Patients who died were older than patients who survived (p<0.01). Among 19 EVALI patients who died and for whom data on substance use was available, the use of any THC-containing products was reported by patients or proxies for 84% (16), including 63% (12) who exclusively used THC-containing products. Use of any nicotine-containing products was reported for 37% (seven), including 16% (three) who exclusively used nicotine-containing products. Use of both THC- and nicotine-containing products was reported in four decedents.
Discussion
Cases of EVALI continue to be reported to CDC as part of this national outbreak. Similar to previous reports at the national and state levels (1–4), most patients reported use of THC-containing products in the 3 months before symptom onset. Patients were predominantly aged <35 years, non-Hispanic white, and male. Patients with EVALI who died were older than patients who survived. Illnesses and deaths occurred across an age spectrum, from adolescents to older adults. Approximately half of cases, and two deaths, occurred in patients aged <25 years. Older adults were disproportionately represented among patients who died; only 2% of cases, but nearly 25% of deaths, occurred in patients aged >65 years. Further, any use of THC-containing products was reported for 86% of patients who survived and 84% of patients who died; exclusive use of THC-containing products was reported for 63% of EVALI patients who died and for 33% who survived.
Findings from this report, which is the largest analysis of EVALI patients to date, suggest that this outbreak continues to primarily affect young persons, highlighting the need to communicate the dangers of e-cigarette, or vaping, use particularly among youths and young adults. Although 2% of all EVALI patients were aged 65–75 years, 24% of deaths were in this age group; relevant tailored and targeted messaging might also be needed for this age group. Consistent with previously published reports (1–4), the data presented here suggest that THC-containing products are playing an important role in this outbreak. Further, reports from Illinois, Utah, and Wisconsin suggest that patients have typically obtained their THC-containing e-cigarette, or vaping, products through informal sources, such as friends or illicit in-person and online dealers, although local and regional differences in illicit THC supply and production might exist (3,4).
The findings in this report are subject to at least three limitations. First, data on substances used in e-cigarette, or vaping, products were self-reported or reported by proxies and might be subject to recall bias, as well as social desirability bias because nonmedical marijuana is illegal in many states. Therefore, underreporting might have occurred, particularly for patients who died and others whose information was provided by a proxy. Second, data on some variables, such as race/ethnicity, were missing for many patients, and conclusions based on these data might not be generalizable to the entire patient population. Finally, these data might be subject to misclassification of substance use for multiple reasons. Patients likely did not know the content of the e-cigarette, or vaping, products they used, and methods used to collect substance use data varied across states.
To date, no single compound or ingredient has emerged as the cause of EVALI, and there might be more than one cause. Because most patients report using THC-containing products before the onset of symptoms, CDC recommends that persons should not use e-cigarette, or vaping, products that contain THC. Persons should not buy any type of e-cigarette, or vaping, products, particularly those containing THC, off the street and should not modify or add any substances to e-cigarette, or vaping, products that are not intended by the manufacturer, including products purchased through retail establishments. In addition, because the specific compound or ingredient causing lung injury is not yet known, and while the investigation continues, persons should consider refraining from use of all e-cigarette, or vaping, products. E-cigarette, or vaping, products should never be used by youths, young adults, or women who are pregnant. Moreover, persons who do not currently use tobacco products should not start using e-cigarette, or vaping, products (2,5).
Boxed Text
What is already known about this topic?
CDC and partners are investigating the ongoing outbreak of e-cigarette, or vaping, product use–associated lung injury (EVALI) in the United States, the District of Columbia, and one U.S. territory.
What is added by this report?
As of October 22, 2019, a total of 1,604 cases of EVALI, including 34 deaths, were reported to CDC. Based on data collected as of October 15, 2019, use of tetrahydrocannabinol (THC)-containing products in the 3 months preceding symptom onset was reported by 86% of patients. The median age of EVALI patients who survived was 23 years, and the median age of EVALI patients who died was 45 years.
What are the implications for public health practice?
Most EVALI patients report using THC-containing products before symptom onset. CDC recommends that persons should not use e-cigarette, or vaping, products containing THC. Because the specific compound or ingredient causing EVALI is not known, persons should consider refraining from use of all e-cigarette, or vaping, products.
Acknowledgments
Sarah Khalidi, Sondra Reese, Alabama Department of Public Health; Appathurai Balamurugan, Allison James, Arkansas Department of Health; Monique Adakai, Emily Carlson, Arizona Department of Health Services; Armando Chevez, Daniel U. Kwon, California Department of Public Health; Elyse Contreras, Katelyn E. Hall, Colorado Department of Public Health and Environment; Sydney Jones, Connecticut Department of Public Health; Adrienne Sherman, Kenan Zamore, District of Columbia Department of Health; Amanda Bundek, Caroline Judd, Division of Public Health, Delaware Department of Health and Social Services; Heather Rubino, Thomas Troelstrup, Florida Department of Health; Georgia Department of Public Health Lung Injury Response Team; Hawaii Department of Health; Chris Galeazzi, Ben Williamson, Iowa Department of Public Health; Eileen M. Dunne, Kathryn A. Turner, Idaho Division of Public Health; Dawn Nims, Lori Saathoff-Huber, Illinois Department of Public Health; Kathryn Gaub, Sara Hallyburton, Indiana State Department of Health; Amie Cook, Kansas Department of Health and Environment; Kentucky Department for Public Health; Julie Hand, Theresa Sokol, Louisiana Department of Health; Daniel Church, MaryKate Martelon, Massachusetts Department of Public Health; Kenneth A. Feder, Clifford S. Mitchell, Maryland Department of Health; Maine Center for Disease Control and Prevention; Rita Seith, Eden V. Wells, Michigan Department of Health and Human Services; Stacy Holzbauer, Terra Wiens, Minnesota Department of Health; Valerie Howard, George Turabelidze, Missouri Department of Health and Senior Services; Paul Byers, Kathryn Taylor, Mississippi State Department of Health; Kim Bailey, RiverStone Health; William Gavin, Gallatin City-County Health Department; Ariel Christensen, Molly N. Hoffman, North Carolina Division of Public Health; Clint Boots, Tracy Miller, Kodi Pinks, North Dakota Department of Health; Matthew Donahue, Tom Safranek, Nebraska Department of Health and Human Services; Suzann Beauregard, Pascal Kalin, New Hampshire Department of Health and Human Services; Lisa McHugh, Stephen Perez, New Jersey Department of Health; Alex Gallegos, Joseph T. Hicks, New Mexico Department of Health; Ashleigh Faulstich, Victoria LeGarde, Melissa Peek-Bullock, Nevada Department of Health and Human Services; Adam Helman, Kristen Navarette, New York State Department of Health; Courtney Dewart, Kirtana Ramadugu, Ohio Department of Health; Claire B. Nguyen, Tracey Wendling, Oklahoma State Department of Health; Amanda Faulkner, Tasha Poissant, Oregon Health Authority; Joann F. Gruber, Laurel Harduar Morano, Pennsylvania Department of Health; Ailis Clyne, Morgan Orr, James Rajotte, Rhode Island Department of Health; Sharon Biggers, Virginie Daguise, Daniel Kilpatrick, South Carolina Department of Health & Environmental Control; Joshua L. Clayton, Jonathan Steinberg, South Dakota Department of Health; Julie Shaffner, Kelly Squires, Tennessee Department of Health; Emily Hall, Varun Shetty, Texas Department of State Health Services; Esther M. Ellis, U.S. Virgin Islands Department of Health; Nathaniel Lewis, Utah Department of Health; Jonathan Falk, Lilian Peake, Virginia Department of Health; Vermont Department of Health; Michelle Holshue, Cathy Wasserman, Washington State Department of Health; Staff members, Wisconsin Department of Health Services; Shannon McBee, Christy Reed, West Virginia Department of Health and Human Resources; and Melissa Taylor, Wyoming Department of Health.
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Footnote Group
Footnotes
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Contributor Information
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References
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