A5034876818- Infection Control and Ventilation
- Dental Research and COVID-19
- SARS-CoV-2 and COVID-19 Research
- COVID-19 epidemiological studies
- Respiratory viral infections research
- SARS-CoV-2 detection and testing
- Viral Infections and Outbreaks Research
- COVID-19 Clinical Research Studies
- Social and Educational Sciences
- Infection Control in Healthcare
- Aerodynamics and Acoustics in Jet Flows
- Animal Virus Infections Studies
- COVID-19 and healthcare impacts
- Bacteriophages and microbial interactions
- Aerospace Engineering and Energy Systems
University of Helsinki
2022-2025
Finnish Meteorological Institute
2022
Finnish Institute for Health and Welfare
2022
Helsinki University Hospital
2022
COVID-19 has highlighted the need for indoor risk-reduction strategies. Our aim is to provide information about virus dispersion and attempts reduce infection risk. Indoor transmission was studied simulating a dining situation in restaurant. Aerosolized Phi6 viruses were detected with several methods. The aerosol modeled by using Large-Eddy Simulation (LES) technique. Three strategies studied: (1) augmenting ventilation air purifiers, (2) spatial partitioning dividers, (3) combination of 1...
We report an experimental infection of American mink with SARS-CoV-2 Omicron variant and show that remain positive for viral RNA days, experience clinical signs histopathologic changes, transmit the virus to uninfected recipients. Preparedness is crucial avoid spread among spillover human populations.
<title>Abstract</title> The SARS-CoV-2 BA.1 (Omicron) variant, which emerged in late 2021, is more transmissible than earlier variants but causes milder symptoms humans. Mink farms, where animals are housed close quarters, present a high risk for virus transmission and mutation, necessitating strict control measures due to documented cases of mink-to-human human-to-mink transmission. Hence, we aimed detect viable airborne using BioSampler-air collectors investigate aerosol between groups...
Dental healthcare personnel (DHCP) are subjected to microbe-containing aerosols and splatters in their everyday work. Safer work conditions must be developed ensure the functioning of system. By simulating dental procedures, we aimed compare virus-containing aerosol generation four common instruments, high-volume evacuation (HVE) mitigation. Moreover, combined detection infectious viruses with RT-qPCR form a fuller view spread procedures. The air-water syringe produced highest number...
Abstract We report an experimental infection of American mink with SARS-CoV-2 Omicron variant and show that minks remain virus RNA positive for days, develop clinical signs histopathological changes, transmit the to uninfected recipients warranting further studies preparedness.
Virus seasonality is affected by many environmental factors. UV radiation a less studied but potentially important factor in virus outdoor aerosol transmission. transmission an Arctic environment was simulated nebulizing Phi6 outdoors to study long range Aerosolized viruses were collected using host-containing agar plates, Biosamplers and filter collectors. Additionally, the effects of long-term exposure solar on its host bacteria Pseudomonas syringae. remained infectious aerosols for at...
Development of efficient indoor air filtration technologies has gained prominence during the COVID-19 pandemic. This study investigated antiviral effect various copper and silver-based surface coatings for filters which were tested in an aerosol chamber using enveloped model bacteriophage Phi6. Some shown to fully inactivate Phi6 viruses up 15 min. However, when filter prefilter materials coated with chosen material their properties did not differ significantly from uncoated or prefilters...
Abstract Dental healthcare personnel (DHCP) are subjected to microbe-containing aerosols and splatters in their everyday work. Safer work conditions must be developed ensure the functioning of system. This study aimed evaluate risks that different dental procedures pose DHCP, efficacy high-volume evacuation (HVE) risk mitigation. We studied virus-containing aerosol generation four common instruments by simulating procedures. The air-water syringe produced highest number aerosols. HVE greatly...