Persoanele infectate cu SARS-COV-2 elimină prin expirație, vorbire sau tuse două tipuri de particule – unele mai mari și mai grele, care se așază pe sol/podea sau pe obiectele din jur, și unele mici, ușoare, care rămân în suspensie: aerosolii.
Cercetători care au luat mostre de aer din două spitale din Wuhan, epicentrul pandemiei de coronavirus, au descoperit aerosoli de COVID în toaletele spitalelor, în vestiarele medicilor și asistentelor și în sălile de așteptare, concluzionând că particulele virale rămân în aer multe ore în spații strâmte, aglomerate și neaserisite.
Cea mai mare concentrație de particule virale în aer a fost descoperită în vestiare. Cauza, presupun oamenii de știință conduși de prof. Ke Lan, de la Wuhan University, ar fi faptul că acolo își scot medicii și asistentele măștile, mănușile și halatele care ar fi contaminate cu COVID-19, iar particulele virale ar trece de pe echipamentele de portecție în aer și ar rămâne în suspensie.
Nu se știe dacă aceste particule conțin virus activ, adică dacă pot infecta persoanele care le inspiră; pentru asta urmează un nou studiu.
Foto: EPA
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