- 18-25-Year-Olds' Experiences of Wearing Face Masks during the COVID-19 Pandemic in Finland 2020-2021(2023-01-02) Pietilä, Meri; Saurio, Kaisa; Hankonen, Nelli; University of Helsinki - Pietilä, Meri; University of Helsinki - Saurio, Kaisa; University of Helsinki - Hankonen, Nelli