Figure.

Flowchart of COVID-19 case-patients and household contacts, United Kingdom, 2020 (n = 365 primary cases)

COVID-19: coronavirus disease.

^a 16 persons had onset of symptoms > 2 weeks after onset date in the primary case.

^b Nine persons had specimen date (or laboratory result date if specimen date not known) > 2 weeks after primary case-patient symptoms onset and four had a positive test result.

^c Two persons (neither positive) had specimen date (or laboratory result date if specimen date not known) > 2 weeks after primary case-patient symptoms onset.

^d One person (not positive) had laboratory result date > 2 weeks after primary case-patient symptoms onset.

The chart includes contacts with any respiratory symptoms, and contacts with at least one of cough, fever or anosmia, contacts from whom specimens were collected and RT-PCR result.