Volume 28, Number 7—July 2022
Research Letter
University-Associated SARS-CoV-2 Omicron BA.2 Infections, Maricopa County, Arizona, USA, 2022
Table
Characteristics of SARS-CoV-2 B.1.1.529 Omicron BA.2 cases among students and staff affiliated with a local university, Maricopa County, Arizona, USA, January 2022*
Characteristics | No. (%) |
---|---|
Median age, y (IQR) |
21 (19–24) |
Sex | |
M | 29 (66) |
F |
15 (34) |
Race and ethnicity | |
Asian, non-Hispanic | 12 (27) |
White, non-Hispanic | 3 (7) |
Other/unknown |
29 (66) |
University affiliation | |
Student | 43 (98) |
Staff |
1 (2) |
Case interview response type | |
Telephone interview and electronic survey | 20 (45) |
Electronic survey only | 13 (30) |
Lost to follow-up |
11 (25) |
University clinic visit <7 d of illness onset† | |
Y | 8 (18) |
N |
36 (82) |
Symptom status | |
No symptoms | 8 (18) |
Unknown | 10 (23) |
Any COVID-19 symptom | 26 (59) |
Sore throat | 18 (41) |
Cough | 16 (36) |
Runny nose, cold-like symptoms | 16 (36) |
Fever | 15 (34) |
Muscle aches | 11 (25) |
Fatigue | 10 (23) |
Chills | 4 (9) |
Headache | 4 (9) |
Shortness of breath | 2 (5) |
Difficulty breathing | 2 (5) |
New loss of taste or smell | 2 (5) |
Diarrhea | 2 (5) |
Vomiting |
1 (2) |
Outcome | |
Hospitalized | 0 |
Died |
0 |
COVID-19 vaccination status | |
Primary series completed, not boosted | 24 (55) |
mRNA, Pfizer or Moderna | 16 (50) |
Janssen/Johnson & Johnson | 5 (16) |
Vaxzevria, Oxford-AstraZeneca | 11 (34) |
Primary series and booster completed | 8 (18) |
Unknown or unvaccinated |
12 (27) |
Median days from primary vaccination series completion to illness onset (IQR)‡ | 216 (164–269) |
Median days from booster vaccine dose to illness onset (IQR) | 27 (19–42) |
*Illness onset is defined as the first day of symptom onset or the day of positive specimen collection (if asymptomatic or lost to follow-up). IQR, interquartile range. †Within 7 days before or 7 days after illness onset. ‡Excludes case-patients who received a booster dose of COVID-19 vaccine (n = 8).
Page created: April 28, 2022
Page updated: June 18, 2022
Page reviewed: June 18, 2022
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