Wells-Riley & HVAC Filtration for infectious airborne aerosols NAFA Foundation Report HVAC filtration and the Wells-Riley approach to assessing risks of infectious airborne diseases
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Indoor Airborne Bio Aerosols in Valiasr Hospital in Zanjan, Iran
Background: Bio aerosols include airborne micro-organisms such as bacteria, fungi, viruses, etc and their products. Exposure to a bio aerosol is linked with a broad spectrum of health problems, including infectious diseases, acute toxic effects, allergies, and cancer. The aim of this study was to evaluate the quality and quantity of bio aerosols found in the air of different wards in Valiasr Ho...
متن کاملA probabilistic transmission dynamic model to assess indoor airborne infection risks.
The purpose of this article is to quantify the public health risk associated with inhalation of indoor airborne infection based on a probabilistic transmission dynamic modeling approach. We used the Wells-Riley mathematical model to estimate (1) the CO2 exposure concentrations in indoor environments where cases of inhalation airborne infection occurred based on reported epidemiological data and...
متن کاملASHE Monograph
T his literature review explores the role that ventilation, assessed by air changes per hour (ACH), plays in infection transmission and disease control. The American Society of Heating, Refrigerating, and Air-Conditioning Engineers (ASHRAE) Position Document on Airborne Infectious Diseases (2009) notes the dilution effect that ACH has on infectious disease transmission. The Wells-Riley equation...
متن کاملModelling the transmission of airborne infections in enclosed spaces.
The Wells-Riley equation for modelling airborne infection in indoor environments is incorporated into an SEIR epidemic model with a short incubation period to simulate the transmission dynamics of airborne infectious diseases in ventilated rooms. The model enables the effect of environmental factors such as the ventilation rate and the room occupancy to be examined, and allows the long-term imp...
متن کاملThe role of infectious aerosols in disease transmission in pigs.
Airborne transmission is of significance for a number of infectious diseases in pigs. The general principles of the airborne pathway, including aerosol production, decay and inhalation, are reviewed. Practical issues regarding aerosol sampling and sample analysis are also discussed. Details of the aerobiology of porcine diseases, including foot-and-mouth disease, Aujesky's disease, and respirat...
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