Please read Dr. Kipen’s article in Indoor Air titled, “Portable air cleaners and residential exposure to SARS-CoV-2 aerosols: A real-world study.“
COVID-19 caused by SARS-CoV-2 remains a deadly pandemic, and new variants such as Delta (B.1.617.2) and especially Omicron (B.1.1.529) are highly transmissible. As of January 9, 2022, there were 299 million cases of COVID-19 worldwide, causing 5.4 million deaths with over 2.3 million daily cases still being recorded. There have been 57.5 million confirmed cases in the United States alone, with 826 000 deaths and counting. Increasing evidence and informed opinion indicate that virus-laden aerosol particles play an important role in the transmission and pathogenesis of SARS-CoV-2 infection. Viral particles originating from the respiratory tract have a bimodal size distribution, which underlies two primary pathways for airborne transmission. Relatively large respiratory droplets (e.g., from ~10 to 100 µm and larger) rapidly settle onto surfaces, typically within 1–2 m of the source. To read the full article.
Portable air cleaners and residential exposure to SARS-CoV-2 aerosols: A real-world study. Myers NT, Laumbach RJ, Black KG, Ohman-Strickland P, Alimokhtari S, Legard A, De Resende A, Calderón L, Lu FT, Mainelis G, Kipen HM. Indoor Air. 2022 Apr;32(4):e13029. PMID: 35481935 DOI: 1111/ina.13029 Clinical Trial.