Dose makes the risk - more the inhaled dose, more the risk of infection. These are screenshots of a slide deck made with pointers from @CorsIAQ and @ayushumd
A 🧵 1/
2) Risk of infection can be related to the inhaled dose. This helps to understand mitigation measures at a very simple and basic level. The slides were intended for high school students
3) Start with a dessert - in this case, an Indian dessert. If you are a bigger sweet tooth than me, you must want lots of spoons of sugar, right?
4) Similarly, but in a more scary way, if you inhaled more virus bearing particles, you would be at greater risk. And how much you inhale depends on the factors below
5) If you are trying to explain it very simply or think about it critically, think of factors that affect your breathing
6) What affects the amount of virus bearing particles in the surrounding air?
7) Time spent has to be an important factor right?
8) And finally, all this thinking so that we can mitigate it right
9) Three simple heads to arrange your measures under - distancing, less time spent, avoiding crowded spaces, masks, ventilation - all of them can be put under one or more of these heads. Try for yourself.
10) Think a bit more about the virus bearing particles floating around you - now, in terms of mitigating
11) Can time help us?
12) What is the problem with crowded spaces?
13) Exercise, outdoors, and ventilation (dilution).
Outdoors can help out a lot. Think and plan carefully.
In the same vein, do not just convert outdoors into an extension of indoors using enclosures or with overcrowding.
14) Tiny drops can gather to make an ocean, then they can certainly gather to reach an infectious dose.
15) Our goal is to minimize how much of these virus bearing particles get in.
popsci.com/health/survivo… A thread on long term impacts of polio for the survivors.
TLDR: Post polio syndrome warns us of what post covid/long covid could look like in the years to come. 1/
Polio, a dreaded disease during the 1940s, 1950s is a distant memory for most of us now. "By the 1940s and early 50s, the polio terror was killing or paralyzing more than a half million people globally each year." 2/
In mid 1950s, highly effective vaccines came out, eradicating the disease from entire countries - this was a high point for public health 3/
#PollensAreAirborne
Average pollen size 25 microns, i.e., about 125 times larger than respiratory aerosols carrying pathogens.
He investigated over 80 types of pollens, concluding grasses caused the greatest reaction. He was in correspondence with Darwin:
Darwin asked if there is a difference between plants that pollinate by wind and those that pollinate by insects.
Can pollen be carried large distances in the upper regions of the atmosphere? Blackley wrote on 7 July 1873: "his experiments ... inspired by Darwin’s ... collecting atmospheric dust at Porto Praya" darwinproject.ac.uk/humannature/20…
A 🧵on mitigating against heatstrokes, especially during heatwaves but generically, during the entirety of summers.
This is based on a bit of my experience of 25+ Indian summers and a bit of my research background 1/
Locations previously unacquainted with hot summers now have to face them. And in the tropics, you have longer periods of high temperatures. Both things can be scary when it comes to a heat stroke. 2/
A very basic thing, but bears repeating. Hydrate. And carry a bottle of water, since you never know when thirst might strike. 3/
****Why the WHO took two years to say COVID is airborne****
In short: hubris, conservative thinking, group thinking, and the group defending its own. A 🧵 on the Nature article 1/
2. WHO categorically tweeted in March 2020, “FACT: #COVID19 is NOT airborne,” - shouting out how sure they were about the statement
3. Their recco based on decades-old infection-control teachings. Also included one metre distancing and handwashing and surface disinfection. In the last 6 decades, their understanding of respiratory infections has not evolved
The obsession with returning to "normal" has more to do with collective inertia than any love for "normalcy".
What was so special about the normal we want to return to? And in our fetish for a return, we missed so many opportunities of making things better. A dynamic thread 🧵1/
2/ Flushing toilets is a significant aerosol generating process. The pandemic should have opened our eyes to this. Just put the lid down when flushing, even at your own home. Even if those are your germs, do you really want them all through the home? commons.wikimedia.org/wiki/File:Toil…
3/ Outdoor dinning - weather permitting and sometimes, even when weather not exactly permitting. We know how to make ourselves locally warm. All it needed was focus and some investment. Some took the initiative, but largely, we seem to be okay with eating inside stuffy rooms 🙄
One more attempt at making a visual engagement for emphasizing the importance of better masks. This effort was led and culminated by @Its_Airborne - I am too lazy otherwise.
What started with a thread, is now interactive: bettermasks.its-airborne.org
This is a schema intended for two purposes - 1) To give a visual depiction of how much better respirators can be than cloth or surgical masks due to their better fit and filtration.
2) To give a feeling of how things have changed with variants. For example, is cloth masks on everyone gave a certain level of protection with the wild variant, with omicron, you may now need surgical masks with fit adjusters for the same level of protection.