A bit more background: Over the past year, there has been an amazing group of people from around the world working together to induce a paradigm shift in the field of medicine to acknowledge long and short range aerosol transmission of respiratory viruses. (1/4)
These people worked together nonstop & I was honored to be part of their efforts. All this group ever cared about was helping the world understand this virus is airborne. They were a team aiming to "stop the virus". (2/4)
Many of these people were personally experiencing "droplet dogma" and being forced to wear inadequate PPE. Had any new evidence come along to show this virus was not airborne, there is zero doubt they would have completely shifted their message. (3/4)
So today was a big day for the world. @WHO finally acknowledged aerosol transmission as a major pathway. Everyone in the world wins. It has been amazing to see people coming together from across many fields to properly protect people living in all parts of the world. (4/4)

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More from @kprather88

28 Apr
Answering a question I (and others) have received 1000's of times--how do I protect myself indoors?
The guidance on @CDCgov web site is not clear. In fact, in some places it still states INCORRECTLY that outside of healthcare settings, airborne protection is not needed. (1/8)
Here are the key steps in a nutshell-

1. Ventilation-keep windows and doors open as much as possible. Check "fresh air" using simple CO2 monitor. Takes away guessing game. I take them everywhere I go indoors...the level needs to be <800 ppm or so.
2. Filtration is also important--MERV13 in HVAC and standalone HEPA systems (no bells or whistles)--easily remove infectious aerosols. In buildings where you can't upgrade HVAC easily, these standalones are important and serve as another extra layer of protection.
Read 11 tweets
17 Apr
Thinking about the last week makes me realize the positive side of Twitter. #COVIDisAirborne has brought together an amazing group of "aerosol activists". The debate w/ @DFisman against Dr. Conly was totally supported and initiated by many I met through Twitter. @jvipondmd (1/3)
Many people helped me pull all of the fast moving COVID studies together especially @CPita3 @JenniferKShea. @TheLancet article was led by @trishgreenhalgh and many others including @zeynep @jljcolorado @chipatucsd @DFisman...with input from many including @linseymarr. (2/3)
I want to thank everyone-w/ many more-for helping get out the word that #COVIDisAirborne. I look forward to working with @CDCgov and @WHO to improve messaging by incorporating all we have learned. Yes, it has been intense, but it is clear everyone is trying to help. (3/3)
Read 4 tweets
12 Apr
Modes of airborne transmission for SARS-CoV-2. The most common routes are short range and long range aerosol inhalation. Chance of being sprayed with a small number of falling droplets is relatively small. (1/8)
Important to keep in mind: for this virus, most people who transmit it do not have symptoms. So they are not coughing or sneezing. By simply speaking, they are producing thousands of aerosols which can build up over time in poorly ventilated rooms. (2/8)
An increasing # of studies are being published showing examples of outbreaks that can only be explained by aerosol/airborne transmission. Here, a chorist in a church infected people behind him. Droplets drop and certainly don't do U-turns. Clearly #COVIDisAirborne. (3/8)
Read 8 tweets
10 Apr
Back in July 2020, 239 experts warned the @WHO that the SARS-CoV-2 virus is airborne. Since then, we have moved from 12M to 133M cases globally. That is 121M more cases. There were 562k deaths--now 2.9M. That is 2.3M more deaths. (1/3)
It will take some time to sort out the # of extra deaths and extra cases of COVID-19 due to not properly acknowledging and protecting against #COVIDisAirborne. (2/3)
There have been ~400 peer reviewed pubs showing this virus is airborne. What will it take for @WHO to acknowledge this virus is airborne? Today, Dr. Conley from WHO acknowledged it can be airborne. To continue to not make this clear and save lives is incomprehensible. (3/3)
Read 4 tweets
9 Apr
We will only "win" when this pandemic ends--and that requires @WHO (and @CDCgov) to formally acknowledge that this virus is airborne. Dr. Conly stated airborne transmission happens. I hope his statement will translate into recommendations that will help the world. (1/5)
At this point, there is ZERO reason for @WHO to not be recommending precautionary measures. It is a tragedy (which will go down in history) for their leaders to continue to not share with the world the best ways to protect public health is by cleaning the air. (2/5)
We know how to end this pandemic. Look back at lessons over time (over 100 years ago) and around the world at places that were successful because they embraced it is airborne from the beginning. Places like Taiwan never shut down and have 7 deaths out of 24M people. (3/5)
Read 5 tweets
23 Mar
Getting a bit nervous about school re-openings with variant B.1.1.7 coming soon which seems to prefer young people. Felt like I had thought of everything but playing field is changing. First, we should start learning from others like MN and WI which are seeing new outbreaks.(1/6)
Now, I am hearing about athletics! I have just been told high school athletes have started to play indoor sports. On the positive side, these gyms have very, very high ceilings, and they are very large rooms. (2/6)
On the worrisome side, gyms have an electric exhaust fan on the top of the gym ceiling, that sucks air out. That is it! No HVAC or anything equivalent. There may be one or two doors that lead to the outside, but most doors only open onto hallways. Not good. (3/6)
Read 6 tweets

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