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1. Prev Med. 2014 May;62:1-7. doi: 10.1016/j.ypmed.2014.01.015. Epub 2014 Jan 25. Efficacy of face masks and respirators in preventing upper respiratory tract bacterial colonization and co-infection in hospital healthcare workers.Cited by: 24
Jun 01, 2018 · An analysis of internet purchases of face masks in urban areas across China found that a 100-point increase in the Air Quality Index resulted in a 70% increase in sales of masks marketed as ‘anti-PM 2.5 ’ and a 54% increase in all mask purchases,28 indicating that this is a popular method of protection used by people in China. To ensure ...Cited by: 17
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From all the test result, N95 is good enough for filtering most of the PM2.5 particles, but sensitive persons can consider using N99 version of those masks (N99 stands for filtering more the 99% of airborne particles). Note that a similar mask, with model number 9001 is also commonly available and corresponds to N90 filtration standard.
Mask-wearing and respiratory infection in the subjects Characteristic Total (n = 400) Number Percentage (%) Mask-wearing adherence* Good 280 70.0 Poor 120 30.0 Mask type Cotton-yarn mask 239 59.8 Medical mask 161 40.2 Adverse effects Any adverse effect 336 84.0 Difficulty breathing 226 56.5 Discomfort 204 51.0 Allergy 95 23.8 Pain 43 10.8 â ...Cited by: 13
"The vast majority of face masks on the market give no protection against PM2.5, even if the manufacturers claim they do," said Lei Limin, vice chairman of the China …
Oct 15, 2016 · METHODS: In this prospective single-center study, we instituted a universal surgical mask policy requiring all individuals with direct contact with HSCT patients to wear a surgical mask, regardless of symptoms or season. The primary endpoint was the incidence of RVIs in the mask period (2010-2014) compared with the premask period (2003-2009).Cited by: 15
Jan 15, 2013 · Shares in a Chinese face mask manufacturer have soared as investors looked for opportunities to cash in on the severe air pollution that has blanketed large swathes of China.
Dec 07, 2015 · Rising smog levels prompt brisk sales of respiratory masks in China. Share. ... A Chinese woman covers her face from pollution as she waits to cross a road on December 1, 2015 in Beijing, China.
Dec 09, 2015 · She also spent 258 yuan on 50 disposable respirator face masks that are supposed to filter anything larger than PM2.5. Advertisement “But that’s not the end of it,” said Wu.
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Positive-pressure respirators do the work of pushing air to the respirator headtop or facepiece; they can either be powered-air, using a battery-powered blower to pull air through a filter, or supplied-air, bringing clean air through a hose from a source outside of the contaminated work area (refer Appendix A, AS/NZS 1715, requirements for air quality for supplied air respirators).
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TAJ 1001-2015 PM2.5 protective mask (English Version) Standard No.: TAJ 1001-2015: Status: valid remind me the status change. Language: English: File Format: PDF: Word Count: 3500 words Price(USD): 130.0 remind me the price change. Implemented on: 2016-3-1 …
OF CHINA TEXTILE COMMERCE ASSOCIATION ICS 13.340.30 W 55 Registration number TAJ 1001-2015 PM2.5 protective mask PM2.5防护口罩 Issued on: December 1, 2015 Implemented on: March 1, 2016 Issued by: China Textile Commerce Association ChineseStandard.net -- Buy True-PDF -- Auto-delivered in 0~10 minutes.
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Introduction. Chinese cities face some of the worst urban air pollution in the world, in part because of China’s rapid economic expansion and industrial development (Chan and Yao 2008).This growth has been accompanied by an expansion of urban population (Zhang et al. 2010), with several megacities (population > 10 million) emerging since the 1990s (Chan and Yao 2008), increasing exposure to ...
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