Description of elements of the TISK (testing, isolation, contact tracing, and quarantine) strategy in relation to SARS-CoV-2 transmission
| Testing | Isolation | Contract tracing | Quarantine |
| People with symptoms of respiratory infection, people defined as close contacts* | Isolation of individuals who tested positive for covid-19 for 10 days after onset of symptoms or test date if asymptomatic† | Identification of close contacts | 10 days' quarantine required for close contacts after exposure |
Isolation and quarantine was mandatory, wheras testing was recommended.
*People who had been in close contact (<2 metre distance for ≥15 minutes, in direct physical contact, or in contact with secretions) with an individual who tested positive for covid-19 within 48 hours before the onset of symptoms or a positive test if asymptomatic.
†Before 2 November 2020, patients with symptoms had to isolate for at least eight days after the start of symptoms and for three days after the end of symptoms.