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Information × Registration Number 2121U006052, Article popup.category Thesis Title popup.author popup.publication 01-01-2021 popup.source_user Сумський державний університет popup.source https://essuir.sumdu.edu.ua/handle/123456789/83936 popup.publisher ALUNA Publishing House Description Overcrowded places cause faster spread of the infection. The consequences of the coronaviruses` mutation show that the transformations can lead to emergencies. popup.nrat_date 2025-05-12 Close