Those exposed to the virus from family members, at the workplace, in schools or in early childhood education are no longer quarantined under the country's Communicable Diseases Act, reports Xinhua news agency.
If a person has mild symptoms and is not at risk, he or she should not go to a Covid-19 test site but should stay at home, the national broadcaster Yle explained.
Besides the Helsinki region, the new rule will also apply in the southern regions of Espoo, Vantaa, Hyvinkaa, Jarvenpaa, Kerava, Kirkkonummi, Mantsala, Nurmijarvi, Pornais, Porvoo and Tuusula.
Throughout Finland, the number of daily Covid-19 cases has multiplied since the beginning of December last year, which has severely congested the country's hospitals and testing centers.
Juha Jolkkonen, director of Helsinki's Social Affairs and Health Care Department, told local media on Monday that the city currently registers around 10,000 new infections per week. The incidence rate has nearly tripled between December 24, 2021, and January 6.
On Monday, Helsinki opened a reserve hospital for Covid-19 patients.
Next week, the city will also start administering vaccines to students in classes 1-5.