Less than half were aware they had COVID. “Importance Some individuals who were infected by the SARS-CoV-2 Omicron variant may have been completely unaware of their infectious status while the virus was actively transmissible.” “Of the 210 participants (median [range] age, 51 (23-84) years; 136 women [65%]) with serological evidence of recent Omicron variant infection, …
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“long-range transmission route is dominant” “…many more students are exposed via the long-range airborne route and the total exposure of all students to the virus via short-range airborne was lower than for long-range airborne.” Link to original research Share via: Twitter LinkedIn Copy Link More
“In a typical inpatient setting, on the other hand, the required indoor CO2 concentration is below 540 ppm with no mask, 770 ppm with a surgical mask, and 8200 ppm with an N95 mask. These findings facilitate the establishment of a strategy for preventing airborne transmission in hospitals. This study is unique in that it …
Indoor CO2 – Permissable Levels to Control Transmission – Jun 23 Read More »
Outpatient treatment with metformin reduced long COVID incidence by about 41%, with an absolute reduction of 4·1%, compared with placebo. Metformin has clinical benefits when used as outpatient treatment for COVID-19 and is globally available, low-cost, and safe. link to original paper The cumulative incidence of long COVID by day 300 was 6·3% (95% CI …
“The mix of very different variants poses a raised immediate re-infection risk for anyone relying on natural immunity from a recent infection.” – Mike Honey Masks, ventilation, isolation – are effective agains any variant. Share via: Twitter LinkedIn Copy Link More
Dr Amanda Kvaslvig “Indoor air quality is still a big gap in our defences and that’s a great pity, because it’s one of the most effective and cost-effective protections that we have. There is just no downside to breathing clean air. It’s a fundamental health protection just like drinking clean water.” “All New Zealanders should feel …
NZ Winter Health Plan 2023 Ignores Ventilation Advice – May 23 Read More »
From now on, every business larger than 15 m² and where people are present for more than 15 minutes will need a CO₂ meter. The measurement must be visible to the customer in the store, on the smartphone or on the company website. Dutch Minister of Health Frank Vandenbroucke (Vooruit) says “If we had taken …
Dutch Law to Require CO2 Reporting for Business – May 23 Read More »
“The entire world was touched by the effects of the pandemic and we learned that an effective way to protect ourselves from the spread of pathogens is to improve the indoor air quality and ventilation in the buildings that we occupy,” (press release from ASHRAE – The American Society of Heating, Refrigerating and Air-Conditioning Engineers) …
ASHRAE – First-Ever Building Pathogen Mitigation Standard – May 23 Read More »
Link to CDC Recommendations Detail at https://johnsnowproject.org/primers/new-cdc-standards-of-air-hygiene/ Interpretation Dr Richard Corsi – “It’s a good start and should decrease inhalation dose of respiratory aerosol concentrations by between about 20% to 40% in many classrooms (based on my experience w/ typical starting points in schools –some w/ recirculation through MERV-13 filters already achieve 5 eACH).” “Importantly, …
CDC – Building Ventilation Target to Prevent COVID-19 Spread – May 23 Read More »