Table

Symptoms reported between 19 November and 3 December, by case status, in SARS-CoV-2 Omicron variant outbreak at Christmas party, Oslo, 26 November 2021 (n = 110)

Symptom Non-cases

(n = 29)
Cases

(n = 81)a
nb Median duration in days (IQR)c n % Median duration in days (IQR)c
Cough 9 3 (2–6) 67 83 4 (3–5)
Runny/stuffy nose 10 4 (2–12) 63 78 4 (2–5)
Fatigue/lethargy 6 3 (2–4) 60 74 4 (2–5)
Sore throat 11 2.5 (1–6) 58 72 3 (2–5)
Headache < 5 55 68 2 (2–4)
Muscle pain < 5 47 58 2.5 (2–4)
Fever < 5 44 54 2 (2–3)
Sneezing 10 4 (2–9) 35 43 3 (2–4)
Reduced smell < 5 10 12 2 (2–3)
Reduced appetite < 5 27 33 3 (2–5)
Heavy breathing 10 12 2 (1–5)
Reduced taste < 5 19 23 2.5 (2–4)
Abdominal pain < 5 5 6 2 (1–3)
Any of the above listed symptoms 19 4 (3–7) 80 99 6 (5–8)

IQR: interquartile range; SARS-CoV-2: severe acute respiratory syndrome coronavirus 2.

a One confirmed case was asymptomatic and therefore not included.

b Symptoms reported by less than five participants are reported as < 5.

c Duration of symptoms might have been underestimated for some participants if the symptoms were still present after the day they were interviewed. Five non-cases and 62 cases reported still having symptoms on the day they were interviewed.