Discover and read the best of Twitter Threads about #aerosols

Most recents (24)

Read 'em for you. There are a number of not-surprising facts that these documents make clear. Our Public Health response was not guided by the best evidence available. Curious as to whether political interference and the interest of certain lobby groups played a role. (1/31)
"Monetary compensation for lost wages, trust in public health regulations and worry about infection was linked to increased intent to adhere to quarantine. However, stricter sanctions, higher fines and penalties for violators did not impact adherence." AB chose the former 2/31
The incubation period across all meta-analyses was an average or median of 5-7 days with the longest reported to be 32 days. There was some evidence the average incubation period may be longer for children and older adults. IMP: the 3 day isolation hotel is nonsensical. 3/31
Read 31 tweets
Le saviez-vous? #LeSaviezVousCOVID

La @SFAR_ORG vient de publier des nouvelles recos dans le cadre de la pandémie COVID
#MondayMotivation car c’est drastique‼️

Le travail de synthèse des experts a abouti à 65 recommandations.
#thread de morceaux choisis en 1️⃣5️⃣ tweets 👇🏽
1️⃣⚠️Organisation des consultations
Cela dit c’est aussi valable pour tous les types de consultation #CovidIsAirbone poke @corinne_depagne
2️⃣Les experts suggèrent que, lors d’une procédure à risque d’aérosolisation chez un patient, quel que soit son statut COVID-19, tt soignant porte un masque FFP2,une coiffe et une protection oculaire (lunettes de protection occlusives ou écran facial). #CovidIsAirborne #aerosols
Read 17 tweets
❗️@WHO updates on main mode of SARS-CoV-2 🦠 transmission❗️

2021.04.30 Q&A ⤵️ ‘How does #COVID19 spread between people?’

I cannot overstate how seismic this paradigm shift is, and should be, in guiding a revised Risk Assessment & Controls framework.… Image
The virus 🦠 SARS-CoV-2 can spread from an infected person’s mouth or nose in small liquid particles when they cough, sneeze, speak 🗣, sing 🎤, or breathe🧘🏻‍♀️.

[why mask needs to cover👃& 👄]

These particles range from larger respiratory droplets 💧 to smaller #aerosols 💦. Image
The SARS-CoV-2 virus 🦠 spreads *mainly* between people in close (short-range) contact, typically within 1 meter (3 feet) of each other.

When #aerosols or droplets containing the virus 🦠 are INHALED or come into DIRECT CONTACT with the [mucous membranes of] 👀,👃, or 👄. Image
Read 6 tweets
Oui et 1 prévention eut été d'enseigner les #aerosols aux français et le choix et la façon de porter le #masque.
Pour que ce ne soit pas un distributeur capteur d'aérosols
Je n'arrive pas à faire passer le message en haut
@helenerossinot @FLAHAULT @jljcolorado
Depuis juillet ai écris à CDO national, Macron, Véran, tous les députés et sénateurs médecins, 2 députés, presse régionale et plus..
On ne voit pas l'intérêt d'un bon #ConfinementPortatif
Réveillez-vous la haut, flute ! (suis poli) Le diable est dans les détails du port du masque
Read 9 tweets
(1/8) Time for engineering solutions.
Can we reopen #hotels #restaurants #bars on 1 May 2021 (or even before)? Taking into account measures below, answer is YES. Based on peer-reviewed published research & solid arguments. Scientific evidence & arguments below.
(2/8) We did STRESS-TEST: worst-case scenario in #aerosol production: full #gym with all persons exercising vigorously. We tested combination #ventilation & #aircleaning: cost- & energy-efficient solution to reduce aerosol particle concentrations. See:…
(3/8) Movie of this experiment: 35 test persons exercising; different settings #ventilation & #aircleaning:
Work by @TUeindhoven @plasmamade supported by @Sportinnovator & @gem_Eindhoven Ongoing #CFD simulations supported by @Microsoft @ANSYS
Read 8 tweets
@JFaerber @JaquetIsabelle 1/2
Inquiétant. Faute FFP2 vous conseille d'appliquer ce que proposent les CDCs des USA. Rendre étanche un masque chirurgical par une petite manip facile. Documentation sur demande. Oui, scandaleux que l'on n'enseigne pas aérosols et masque en 🇫🇷
démo ↘️
@JFaerber @JaquetIsabelle 2/3
Faire suivre => ENSEIGNANTS
@JFaerber @JaquetIsabelle 3/N
Mieux vaut un chirurgical qui ne fuit pas qu'un FFP2 mal ajusté qui inspire par le tour du nez.
Autre tweet en anglais (facile)
Read 18 tweets
1 year ago I got infected w/ #SARSCoV2. I still haven't recovered. I'm not the same person. #LongCovid has fundamentally changed my view on other chronic diseases. I'm a @LongCovidCH advocate fighting for recognition, guidelines for diagnosis & management, & more research. 1/8
I believe most infections happen via #aerosols indoors. #SARSCoV2 is airborne. Measures like 1.5m distance, disinfection of surfaces, plexiglass separation are pathetic & give false security. Wearing the wrong masks or wearing them wrong or not at all is ignorant. #WearAMask 2/8
Children, adolescents & adults can get infected & transmit #SARSCoV2. About 10% of them will suffer from #LongCovid. Irrespective of age, gender, fitness level, health, comorbidities. Risk factors: being female, immunological sensitivity, higher BMI (apparently, not sure) 3/8
Read 8 tweets
1/ Q: What’s up with the new @CDCgov #mask study?

A: Good news, #doublemasking or tightening up ear loops works!
2/ Remember the key features of effective masking: #FILTERING & #FIT.

The @CDCgov released a new experimental study testing ways to improve mask fit for cloth & medical masks to reduce leakage around the edges.…
3/ Using mannequin “headforms” & simulated #coughing they tested:

1️⃣ #Cloth #mask over a medical mask (double masking)
2️⃣ #Medical #mask with knotted ear loops & tucked in sides
Read 9 tweets
#Covid19 If you’re new to understanding #airborne virus transmission, here’s some background
..& a really clear demonstration of #aerosols from @jljcolorado on @weatherchannel #CovidIsAirborne
.. & a 5 minute deep dive into the science of #airborne virus from @linseymarr

Airborne Transmission of COVID-19: How it works and how to protect ourselves - YouTube
Read 9 tweets
Daily Bookmarks to GAVNet 01/16/2021…
21 Global Developments to Watch Over the Next Five Years…

#developments #watch #predicted
Read 10 tweets
1/ Adding #ventilation helps reduce (but not remove!) aerosols & risk from COVID. One simple measure of ventilation is to keep #CO2 sufficiently low. Simple CO2 sensors can be <$150 and are easy to take with you.

One nice summary of consumer CO2 monitors:
2/ The idea is that indoor #CO2 comes primarily from people breathing out; but breathing also produces potentially infectious aerosols. So keeping #CO2 levels <800 ppm (or <600 ppm) means air is likely refreshed rapidly enough to keep aerosol risk low.
3/ There are lots of good resources & articles on improving #ventilation & for using #CO2 monitors for rough checks. This article by @B_resnick from months ago is worth a read as a broad overview on various topics related to air safety wrt COVID/aerosols.…
Read 8 tweets
1/ Really great article that explains common misconceptions & myths about airborne viruses. Clear & easily readable.

Led by a #multidisciplinary slew of all-star scientists. If you trust anyone in the world on these topics, these are the people you trust.…
2/ Dispelled myths:

Myth 1: #Aerosols are droplets with a diameter < 5 μm
Myth 2: All particles > 5 μm fall within 1-2 m of the source
Myth 3: If it's short range, then it can't be airborne
Myth 4: If R0 isn't as large as for #measles, then it can't be airborne
3/ Dispelled myths:

Myth 5a: If it's #airborne then surgical #masks (or cloth face coverings) won't work
Myth 5b: The virus is only 100 nm (0.1 μm) in size so filters and masks won't work
Myth 6: Unless it grows in tissue culture, it's not infectious

Read 5 tweets
#COVID19IsAirborne a #MedEd & community PSA #education 🧵

Let’s talk about #COVID19 🦠➕HOW it’s spread so we ALL know ➕understand WHY #WearAMask

Let’s also ALL understand WHAT TYPE of 😷 or respirators are needed in 🏥➕🏨#Quarantine to protect workers ➕prevent 🦠breaches.
As of Oct 12 Vic @VicGovDHHS @DanielAndrewsMP @VictorianCHO mandated fitted masks 😷only

No more shields, no flimsy face coverings only 2-3 layered fitted 😷
or surgical masks.

This was because our understanding of the #science had changed. Sadly we learned the hard way .....
The change to #WearAMask included a change to #HCW guidelines in #healthcare settings.

Community were now in fitted masks because of recognition of a dominant role of spread of 🦠through the air so now #HCWs also needed greater protection with n95 😷or respirators.
Read 25 tweets
1/x With #COVID19 cases skyrocketing all over the US, holiday meals are going to be very dangerous. To show the risks of meeting indoors I used an #aerosol box model to estimate relative the risks.

Maybe this can help you re-think your plans to gather.…
2/x The #WellsRiley model has been used for decades, was put online recently by @jljcolorado & others as a #COVID19 viral aerosol transmission tool. In July I re-wrote the model onto a different platform @Wavemetrics #IgorPro so I could manipulate faster.
3/x Modeled only room-mixed #aerosol (not droplet spray or aerosol plume; these add risk).

Results highlights:
- No matter the room size, infection for 10 people is at least 40% or much more
- If #superspreader there, everyone will be infected
- Outside, risk drops dramatically
Read 14 tweets
(1/6) On 5 November 2020, I will give invited online lecture "Outdoor and #indoor #ventilation and #dispersion associated with #COVID_19 transmission". Organised by Prof. Chris Baker @lichfieldbaker of @unibirmingham
Register now (max 300 attendants):…
(2/6) Topic 1: droplet transmission in running & cycling. Coming back to the movie below, which has raised much feedback - not always equally relevant - around the world, but also threats to yours truly & stalking of his family. #COVID__19 #COVIDー19 #COVID19 #decency #respect
(3/6) Topic 2: strategies for safely reopening and keeping open indoor sports centers (gyms) in the #COVID__19 pandemic. Suggestion for "certificate of equivalence" as practical solution. Peer-reviewed publication here:…
Read 6 tweets
(1/9) This #COVID__19 crisis is accompanied by surprising lack of #commonsense & knowledge with statements making no sense at all. Detrimental for confidence of the public in #scientific #research. Put in a few simple words in this thread. #coronavirus #Corona Image
(2/9) Number 1: Contradicting statement: many experts doubt role of #aerosols in #covid_19 mass infection but advise to apply good #ventilation. Contradictio in terminis. Ventilation ONLY affects the #aerosol route, nothing else...
#COVID19 #coronavirus #Corona #nonsense
(3/9) Number 2: Wrong statement: "#Contact #sports #outside are ok but not #inside". Inside vs outside in terms of contact makes no difference, this only affects #aerosols. Simple: if you #spit in face of other person you can infect him/her equally in/outside. #football #soccer Image
Read 9 tweets
Daily Bookmarks to GAVNet 10/03/2020…
The science and medicine of human immunology | Science…

#medicine #science #immunology #human
What a Joe Biden presidency would mean for five key science issues…

#science #biden
Read 8 tweets
Mal etwas Fortbildung ....… #aerosols
Plausibilität Übertragung Tröpfchen vs. Oberflächen vs. Aerosole Image
Read 4 tweets
Daily Bookmarks to GAVNet 08/24/2020…
Phenomenal World | Logistics, Labor, and State Power…

#labor #state #logistics #power
How Does Commodity Trading Work? Not Well Enough for Some European Banks - Bloomberg…

#symbiotic #european #trading #memetic #banks
Read 7 tweets

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