Table 1 Baseline characteristics of enrolled Omicron ∆872 BA.2 breakthrough infected patients

Median Age (Range)

16(8–17)

43(36–56)

0.003

Sex

 Female

19(90.48%)

5(71.43%)

0.213

 Male

2(9.52%)

2(28.57%)

Vaccination status

 Two doses of InV

21(100%)

2(28.6%)

 < 0.0001

 Three doses of InV

0

5(71.4%)

Hospital stay days

9(8–9)

7(6–9)

0.126

CT value(NP)

19.53(18.17–23.87)

19.43(18.66–23.20)

0.756

CT value(ORF1ab)

19.87(17.04–25.81)

19.52(17.46–24.28)

0.717

Symptoms

 Fever

21(100%)

5(71.43%)

0.568

 Sore throat

5(23.81%)

2(28.57%)

 Cough

5(23.81%)

4(57.14%)

 Fatigue

9(42.86%)

1(14.29%)

 Headaches

9(42.86%)

1(14.29%)

 Diarrhea

1(4.76%)

0

 Stuffy nose

5(23.81%)

1(14.29%)

 Myalgia

1(4.76%)

1(14.29%)

 Nausea and vomiting

2(9.52%)

0

Severity

 Asymptomatic

0

1(14.29%)

0.078

 Mild

21(100%)

6(85.71%)

Underlying diseases

 Diabetes

1(4.76%)

0

0.157

 Hypertension

0

1(14.29%)

Complete blood counts

 WBC(10⁹/L)

7.30(5.23–8.61)

6.23(5.94–7.83)

0.788

 RBC(10¹²/L)

4.49(4.055–4.88)

4.49(4.29–4.90)

0.547

 HGB(g/L)

126.0(110.5–137.0)

134.0(129.0–157.0)

0.045

 Platelet(10⁹/L)

265.0(183.0–294.0)

203.0(193.0–232.0)

0.336

 Neutrophils(10⁹/L)

4.76(2.80–7.12)

4.69(4.29–5.54)

0.905

 Monocytes(10⁹/L)

0.5(0.46–0.64)

0.49(0.41–0.71)

0.825

 Lymphocyte(10⁹/L)

0.9(0.61–1.45)

0.93(0.52–1.51)

0.926

 Eosinophils(10⁹/L)

0.13(0.08–0.28)

0.12(0.07–0.18)

0.460

 Basophils(10⁹/L)

0.01(0.01–0.02)

0.01(0–0.01)

0.430