Volume 29, Number 5—May 2023
Research Letter
Mpox among Public Festival Attendees, Chicago, Illinois, USA, July–August 2022
Emily A.G. Faherty
, Richard A. Teran, Stephanie R. Black, Vaishali Chundi, Shamika Smith, Brandon Bernhardt, Emma Weber, Bridget Brassil, Peter Ruestow, and Janna L. Kerins
, Richard A. Teran, Stephanie R. Black, Vaishali Chundi, Shamika Smith, Brandon Bernhardt, Emma Weber, Bridget Brassil, Peter Ruestow, and Janna L. Kerins
Table
Characteristics of mpox case-patients attending MD event, by vaccination status before the event, Chicago, Illinois, USA, July–August 2022*
| Characteristics | All cases, n = 40 | Vaccinated before MD, n = 15 | Not vaccinated before MD, n = 25 |
|---|---|---|---|
| Demographics† | |||
| Chicago resident | 36 (90) | 14 (93.3) | 22 (88) |
| Male sex at birth | 39 (97.5) | 15 (100) | 24 (96) |
| Median age in years, IQR | 31 (27.3–35.8) | 32 (29–35.5) | 30 (25.5–35.5) |
| Reported male-to-male sexual contact | 28 (70) | 11 (73.3) | 17 (68) |
| Race/ethnicity | |||
| Non-Hispanic or Latino White | 18 (45) | 8 (53.3) | 10 (40) |
| Non-Hispanic or Latino Black | 9 (22.5) | 2 (13.3) | 7 (28) |
| Hispanic or Latino |
13 (32.5) |
5 (33.3) |
8 (32) |
| Sexual exposures | |||
| Reported having sex during probable exposure period | 32 (80) | 12 (80) | 20 (80) |
| Reported having sex during MD | 14 (35) | 6 (40) | 8 (32) |
| Sex with a main partner at MD | 1 (2.5) | - | 1 (4) |
| Sex with a casual partner at MD | 3 (7.5) | 1 (6.7) | 2 (8) |
| Sex with an anonymous partner at MD | 7 (17.5) | 4 (26.7) | 3 (12) |
| Reported nonsexual skin-to-skin contact or kissing during probable exposure period | 4 (10) | 2 (13.3) | 2 (8) |
| Reported sexual activity outside probable exposure period | 1 (3) | ND | 1 (4) |
| Missing information about sexual exposures | 1 (3) | ND | 1 (4) |
| Median no. sex partners at MD (IQR) | 3.5 (1.3–5) | 4 (2.3–5) | 3 (1–5.3) |
| Met sex partners at MD | 9 (23) | 4 (26.6) | 5 (20) |
| Met at another location | 2 (5) | 2 (13.3) | ND |
| Met by using an online app |
2 (5) |
2 (13.3) |
ND |
| Nonvaccine prevention measures‡ | 28 (70) | 12 (80) | 16 (64) |
| Abstained from sex | 9 (23) | 2 (13.3) | 7 (28) |
| Reduced number of sex partners | 5 (13) | 2 (13.3) | 3 (12) |
| Avoided skin-to-skin contact | 8 (20) | 4 (26.7) | 4 (16) |
| Wore more clothing | 3 (8) | 2 (13.3) | 1 (4) |
| Other measures§ |
8 (20) |
3 (20) |
5 (20) |
| *Values are no. (%) except as indicated. Tests of significant differences by vaccination status were conducted by using Fisher exact tests and t-tests for continuous variables; no values were p>0.05. IQR, interquartile range; MD, Market Days; ND, no data. †Percentages may not add up to 100% because of rounding. ‡Case-patients may have reported adopting >1 prevention measure. §Other measures included isolating after the event and wearing protective clothing or a mask. |
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Page created: March 06, 2023
Page updated: April 19, 2023
Page reviewed: April 19, 2023
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