13 Comments
User's avatar
Typhoid Mary's avatar

This is a great article. I love that the gloves are off.

Dr. K's avatar

Vinay's gloves have been off for a while...beginning after the article where he called masking "bioplausible" which is the same as calling geocentricity of the solar system "astroplausible". Many things are plausible but masking was known not to work at the time, plausible or not. But since then, he has mostly been spot on.

Kent Miller's avatar

Articles like this make me glad I pay to subscribe and support his work.

Dave S's avatar

These studies are important, and more are needed. But a negative result from one intervention—such as a single HEPA filter in a nursing-home room—should not be interpreted as evidence that ventilation and air filtration are unimportant.

COVID-19 spreads predominantly through airborne respiratory particles, particularly in crowded, poorly ventilated indoor spaces. Early restaurant outbreaks showed that infections closely followed seating location and airflow patterns. Outdoor transmission is much less common because exhaled particles are rapidly diluted and dispersed.

The effectiveness of ventilation and filtration depends on the room size, occupancy, airflow pattern, amount of outdoor air introduced and indoor air exhausted, and the capacity and placement of the filtration device. An undersized HEPA filter may accomplish little in a large or crowded room, but that does not negate the value of properly designed ventilation and filtration systems.

Kindergartens are also unusually intense close-contact environments: children interact closely, touch their faces and noses, and readily spread multiple viruses. Handwashing may modestly reduce respiratory illnesses, but it is not a substitute for clean air when dealing with a predominantly airborne virus.

A target of at least five air changes per hour may be needed. We should not write off ventilation because one or two limited interventions failed to demonstrate protection. Further study. Fresher air.

carolyn kostopoulos's avatar

"Joseph Allen" must have stock in the HEPA company. they can make the air better easily- stop putting crap and poisons into it! over turning the EO that protects Glyphosate would be a first good step

Jim Ryser's avatar

Mainstream media is propaganda and I heartily with putting quotes on public health “experts”

Andrei Stieber's avatar

Ashish Jah needs to learn spelling before opining 😏

carolyn kostopoulos's avatar

Broadway theaters spent fortunes fitting out their theaters with HEPA filters, stage managers gave up their offices for the covid police, and for every actual working person, they hired a back up from an "underrepresented marginal group" who stood around and basically did nothing. then they made everyone take classes where they learned that only white males can have "privilege." it really went far in destroying backstage morale.

Beyond Spin's avatar

Though if someone sits in an office in a building without operable windows, wouldn't it make more sense to have a mechanical system that has more outdoor air exchanges and filters more air so aerosolized airborne virions don't accumulate? Such an HVAC system would serve the entire building. Sure, someone who works in this building will eventually go somewhere else without such a HVAC system, but still it's all the sealed "sick" buildings that create a lot of unhealthy indoor environments, not only for airborne viruses.

Anyway, someone should do a study with netty pots for respiratory viruses for children that use that daily versus children who don't use them at all. Which, if either, arm has more respiratory infections. This may sound like a joke, but if post-infection, viruses replicate in the nasopharynx, a netty pot with a saline solution may reduce those viral loads.

Areugnat's avatar

I’ve always been suspicious about HEPA filters. Just a way to make money off of the public.

Joan Breibart's avatar

I heard that INFLUENZA cases decreased during COVID since Americans were no longer hugging everyone they met. But immediately when we went back to work, etc., all the hugging and kissing started again because unlike other cultures such as Japan we can't just nod and say hello because we're so miserable so lonely so fat

Areugnat's avatar

Influenza cases declined dramatically during covid because everything was classified as Covid.

VerumSerum's avatar

Now it makes me wonder if we need them for tissue culture 😅