Table 1.
Mass gathering characteristics, ill traveler demographics, and most frequent illnesses acquired at Umrah and Hajj, the 23rd Scout Jamboree, and the Olympics (n = 296).
| Umrah or Hajj | 23rd World Scout Jamboree | Olympics | |
|---|---|---|---|
| Location | Mecca, Saudi Arabia | Yamagushi, Japan | Rio de Janeiro, Brazil Pyeongchang, South Korea |
| Dates | Hajj: 21–26 September 2015 10–15 September 2016 30 August-4 September 2017 19–29 August 2018 Umrah: At any time during the year, but preferentially during Ramadan |
28 July to 8 August 2015 | 5–21 August 2016 9–25 February 2018 |
| Attendance [[4], [5], [6], [7]] | Hajj 2015: 1,384,941 foreign attendees Hajj 2016: 1,325,372 foreign attendees Hajj 2017: 1,752,014 foreign attendees Hajj 2018: 1,758,722 foreign attendees Umrah 2017: 6,532,074 foreign attendees in 2017 (data not available in other years) |
33,628 attendees | >6,000,000 entrances >1,000,000 entrances |
| Number of GeoSentinel cases | 241 | 17 | Rio: 8 Pyeongchang: 1 |
| Patient age, median (years) | 57 (range: 1–88; IQR: 47–66) | 18 (range: 14–52; IQR: 17–20) | 36 (range: 19–55; IQR: 31–46) |
| Female gender (%) | 51.0 | 47.1 | 22.2 |
| Pre-travel encounter (%) | 67.1a | Not documented | 71.4 |
| Inpatient (%) | 63.9 | 5.9 | 0 |
| Association of illness(es) with MG (%) | 96.7 | 100 | 33.3b |
| Most frequent diagnoses associated with MG (% of patients) | Pneumonia (28.6) Confirmed influenza (22.7) Acute bronchitis (21.9) Influenza-like illness (9.9) Upper respiratory tract infection (7.3) |
Upper respiratory tract infection (29.4) Viral syndrome without rash (29.4) Influenza-like illness (17.7) Pharyngitis (17.7) Skin infection (5.9) |
Viral syndrome without rash (2 patients) Viral syndrome (1 case) Acute bronchitis (1 case) |
| Death | 1 | 0 | 0 |
a
Of 173 records for which information was available.
b
Of 7 records for which information was available.