1. Finnish Institute for Health and Welfare (THL). Coronavirus Cases, Tests, and Deaths, Daily and by Region. https://sampo.thl.fi/pivot/prod/en/epirapo/covid19case/summary_tshcddaily. Accessed 23 Dec 2021 (2021).
2. Finnish Institute for Health and Welfare (THL). Situation Update on Coronavirus (in Finnish). https://thl.fi/fi/web/infektiotaudit-ja-rokotukset/ajankohtaista/ajankohtaista-koronaviruksesta-covid-19/tilannekatsaus-koronaviruksesta. Accessed 23 Dec 2021 (2020).
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