A quiet inclusion that #Covid19 is #airborne and trying to move on is not enough. It is okay to admit you were wrong if you want people to trust you ever again. Not doing so leads to unfair situations 1/
I am focusing on one such situation here that I shall refer to as droplet masking vs aerosol masking 2/
Masks under your nose - breathing, in itself also generates aerosols. It does not have to be big drops expelled from your mouth. So, cover both mouth and nose 3/
Masks need to fit snugly. Just wearing it is not enough, since it is not about blocking big droplets. Adjust the mask to fit your facial features
Keep your mask safe - wearing them around your arms, shoulders is not good for the elastic and a loose ear loop means it is not protecting you enough 5/
Mask up and keep quiet. Speaking not only produces more aerosols, it also intervenes with mask fit. But thinking in terms of droplets, these points would not occur to one. Image from Singapore MRT 6/
Facial hair makes a difference for aerosol leakage. If you want fit-tested respirators, you will need to shave off any facial hair that could interfere with the seal. But even for everyday masks, facial hair can make a difference. Trim up and help your masks do their job 7/
One of the issues that cropped up and has stayed with us due to the initial confusion regarding masking is masks protect others, but they can also protect you. Not all masks are equally good at that, but every mask is better than no mask 8/ doi.org/10.1021/acsnan…
Cloth masks are way worse than respirators. The idea is to use them as a community measure can work when we rely on everyone wearing one so that we have both inward and outward protection. Even so, they are not ideal for high exposure jobs, including HCWs. 9/
But we do not need to promote masks just as an altruistic measure - wear it for the community. No, wear it for yourself as well. In fact, wear a better mask to protect yourself and community better 10/
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.