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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 »

Accross 144 classrooms in 31 schools air measurements reveal that, even with mechanical ventilation in place, improved airflow reduces illness related absences (IRA). “The annual illness-related absence rate at the classroom level was extracted from the student-level absence data and regressed on measured indoor environmental parameters. Significant associations were found. Every 1 L/s per person …

Higher Classroom Ventilation Reduces Illness Related Absences in Elementary Schools – Apr 23 Read More »

A research paper concludes that non-pharmaceutical mitigations were so effective that “In that winter of 2021, the usual seasonal increase in medical causes of childhood mortality was effectively eliminated.” The authors explain that “During the first year of the COVID-19 pandemic, mitigation policies and behaviors were widespread, and although vaccinations and effective treatments were not …

Non-pharmaceutical Interventions Virtually Eliminate Seasonal Increase in Paediatric Medical Deaths in 2021 USA Winter – Apr 23 Read More »

Adapted from Acute and Postacute Sequelae Associated with SARS-CoV-2 Reinfection, figure 5. Published in Nature.

Figures from the state of Victoria, Australia indicate that Hospital Acquired COVID-19 is frequent and may be up to 100 times more lethal.  Hospital-acquired infections pose a serious challenge to healthcare professionals globally, impacting the quality of life of patients, as well as resulting in extra expenditure to our health system.  It has been shown …

Hospital Acquired COVID-19 Poses a Serious Risk to New Zealanders – Apr 23 Read More »

So, here is the situation (probably). The main driver appears to be waning immunity. For those interested in the reasoning or a deep dive into a superb analysis of this situation, here is the link…

This has been an unusual presenting symptom for COVID-19 up to now.

Parents and some politicians are calling for The risk of children developing Long-COVID increases after every infection. We’ve got lots of childrenin a small space breathing in the same air. We need to have ventilation in schools. Excellent short piece from ITV in the UK on this. Link to news article.

Reactive public health strategies will not be able to provide meaningful risk mitigation. Study posted March 08, 2023 The study underlines the necessity for a VaccinesPlus strategy involving pro-active public health measures. Waning immunity and rapid viral evolution both degrade antibody binding titers. But public health authorities worldwide have adopted a strategy of removal of …

“Large jumps in viral evolution may cause failure of population immunity” – March 23 Read More »

The background to the bill appears below…original text of the bill here. Similar clean air regulations in effect or in process: