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Why can't you use masks with air valves under pandemic
On November 25, 2021, the Centre for Health Protection (CHP) of the Department of Health of the Government of the Hong Kong Special...

Dr. Pini
Feb 27, 20221 min read
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The importance of Fit test
Respirators, such as N95 and EN149 FFP2 NR, are designed in a three-dimensional figure. Their edges are close to the face to ensure that...

Dr. Pini
Feb 25, 20222 min read
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Differences between N95 and surgical N95 respirator
As COVID-19 raged for more than two years, vaccination and wearing masks are the most important protection measures against infection. In...

Dr. Pini
Feb 25, 20223 min read
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WHO guidelines and equivalent for surgical respirators (surgical N95)
The National Institution of Occupational Safety and Health (NIOSH) in the United States is and the only agency authorized to issue N95...

Dr. Pini
Feb 24, 20222 min read
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Omicron Waves, what's the problem of normal medical masks?
Living with the overwhelming COVID-19 pandemic for more than two years, it is known that wearing masks is a vital protection against...

Dr. Pini
Jan 26, 20224 min read
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