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Percobaan telah menunjukkan bahwa virus influenza bertahan lebih lama di udara pada kelembaban rendah, dan virus polio - pada kelembaban tinggi. Hal ini sesuai dengan aktivitas influenza yang diamati di musim dingin dan aktivitas polio di musim panas. Grafik pertama dalam artikel menunjukkan tingkat inaktivasi (kematian) virus influenza (\ (\ circ \)) dan poliomyelitis (\ (\ times \)) pada skala logaritmik, bergantung pada kelembaban relatif (dalam persen):
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Yu Wu, et al. Effects of temperature and humidity on the daily new cases and new deaths of COVID-19 in 166 countries ( -19 166 .), The Science of the total environment, 2020, 729:139051.
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Günther Th., et al. Investigation of a superspreading event preceding the largest meat processing plant-related SARS-Coronavirus 2 outbreak in Germany ( , -19 ), Social Science Research Network, 2020-07-23.
Grafik, pengaturan spasial pekerja, kondisi iklim dan ventilasi, transportasi dan kondisi kehidupan dianalisis, analisis lengkap genom virus dilakukan. Diketahui bahwa penularan infeksi terjadi di ruang tertutup di mana udara terus-menerus diedarkan dan didinginkan hingga 10 ° C. Penularan virus di antara karyawan dilakukan dalam tiga hari kerja, dimulai dengan salah satunya. Virus itu ditularkan melalui jarak lebih dari 8 meter. Semua karyawan diharuskan memakai masker dan menjaga jarak.