Table 8 Comparison between raw prevalence rates of COVID-19 cases among Lombardy general population and Lombardy population with HHT

General population

Susceptible Population^a

COVID-19 positive in general population

Only cases with swab molecular confirmation^b

Observed Raw prevalence rate in general population

Only cases with swab molecular confirmation^b

10,027,602

93,901

1:107

HHT

Observed COVID-19 positive cases in HHT

Observed Raw prevalence rate in HHT

Observed Raw prevalence rate in HHT

Observed COVID-19 positive cases in HHT

Observed Raw prevalence rate in HHT

Serol. confirmation, irrespective of swab molecular confirmation^b

Serol. confirmation, irrespective of swab molecular confirmation^b

(Susceptible population: Respondents only = 63)

Serol. confirmation, irrespective of swab molecular confirmation^b

(Susceptible population: Non-Respondents included = 131)

Only cases with swab molecular confirmation^b

Only cases with swab molecular confirmation^b

(Susceptible population: Non-Respondents included = 131)

8

8/63 (12.7%)

1:7.87

8/131 (6.1%)

1:16.37

3

3/131 (2.29%)

1:43.67