نتایج جستجو برای: hepa filter test
تعداد نتایج: 926039 فیلتر نتایج به سال:
During an investigation conducted December 17-20, 2001, we collected environmental samples from a U.S. postal facility in Washington, D.C., known to be extensively contaminated with Bacillus anthracis spores. Because methods for collecting and analyzing B. anthracis spores have not yet been validated, our objective was to compare the relative effectiveness of sampling methods used for collectin...
A face mask is essential personal protective equipment to mitigate the spread of COVID-19. While a cloth has least ability prevent passage infectious respiratory droplets through it compared surgical and N95 masks, does not fit snugly causes significant air leakage. The synthetic fibers in latter reduce comfortability are an allergen for facial eczema. Moreover, CO 2 inhalation reduces heat tra...
BACKGROUND After outbreaks of multidrug-resistant tuberculosis, the Centers for Disease Control and Prevention proposed the use of respirators with high-efficiency particulate air filters (HEPA respirators) as part of isolation precautions against tuberculosis, along with a respiratory-protection program for health care workers that includes medical evaluation, training, and tests of the fit of...
OBJECTIVES To validate the diagnostic performance of Hepa-Index in predicting different stages of hepatic fibrosis in Egyptian patients with chronic hepatitis C (CHC). Methods: Hundred treatment naïve chronic hepatitis C Egyptian patients were prospectively enrolled between June 2014 and January 2015. They were subjected to: platelet count, alpha-2-macroglobulin (α2-MG), total bilirubin, gamma ...
Here we present a device that suppresses transfer of aerosol between nearby seating areas through the use optically transparent, sound transmitting barriers and HEPA fan filter unit (FFU). A potential application this is to lower risk respiratory disease transmission in face-to-face, maskless meetings individuals university setting. We evaluate overall users device. This done for two different ...
During extreme air pollution events, such as bushfires, public health agencies often recommend that vulnerable individuals visit a nearby building with central conditioning to reduce their exposure smoke. However, there is limited evidence these “cleaner indoor shelters” or risks. We quantified the impact of shelter” in library Port Macquarie, NSW, Australia when concentrations fine particulate...
Has the time come to control hepatitis A globally? Matching prevention to the changing epidemiology.
For the first time a global meeting on hepatitis A virus (HAV) infection as vaccine preventable disease was organized at the end of 2007. More than 200 experts from 46 countries gathered to investigate the changing global HAV epidemiology reflecting the increasing numbers of persons at risk for severe clinical disease and mortality from HAV infection. The benefits of childhood and adult hepatit...
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