Quick takes

Striking paper by Anant Sudarshan and Eyal Frank (via Dylan Matthews at Vox Future Perfect) on the importance of vultures as a keystone species.  To quote the paper and newsletter — the basic story is that vultures are extraordinarily efficient scavengers, eating nearly all of a carcass less than an hour after finding it, and farmers in India historically relied on them to quickly remove livestock carcasses, so they functioned as a natural sanitation system in helping to control diseases that could otherwise be spread through the carcasses they consume. In 1994, farmers began using diclofenac to treat their livestock, due to the expiry of a patent long held by Novartis leading to the entry of cheap generic brands made by Indian companies. Diclofenac is a common painkiller, harmless to humans, but vultures develop kidney failure and die within weeks of digesting carrion with even small residues of it. Unfortunately this only came to light via research published a decade later in 2004, by which time the number of Indian vultures in the wild had tragically plummeted from tens of millions to just a few thousands today, the fastest for a bird species in recorded history and the largest in magnitude since the extinction of the passenger pigeon.  When the vultures died out, far more dead animals lay around rotting, transmitting pathogens to other scavengers like dogs and rats and entering the water supply. Dogs and rats are less efficient than vultures at fully eliminating flesh from carcasses, leading to a higher incidence of human contact with infected remains, and they're also more likely to transmit diseases like anthrax and rabies to people. Sudarshan and Frank estimate that this led to ~100,000(!) additional deaths each year from 2000-05 due to a +4.2%(!) increase in all-cause mortality among the 430 million people living in districts that once had a lot of vultures, which is staggering; this is e.g. more than the death toll in 2001 from HIV/AIDS (92,000), malaria

Some recent virology and aerosol science research[1][2] might support an ever-so-slightly higher real cost of atmospheric CO2 and, more practically, an even stronger case for ventilation indoors with respect to biosecurity and pandemics.  Basically, ambient CO2 concentrations have a direct effect on the duration that aerosolized droplets containing SARS-COV2, and probably some other pH-sensitive viruses, remain infectious. This is due to the presence of bicarbonate in the aerosol, which leaves the droplet as CO2. Consider the following equation[2] and then recall or review Le Chetalier's principle from chemistry. H+(aq)+HCO−(aq)3↔H2CO3(aq)↔CO2(g)+H2O(1) More CO2 in the surrounding air shifts the equilibrium to reduce the net loss of CO2 from the aerosol, slowing the rate at which the pH increases, thereby slowing the rate at which the aerosol loses its infectivity (this virus doesn't do well in a high-pH environment). For getting an idea of the magnitude of the effect, Figure 2B[2] and its caption are simple and illustrative: "The effect that an elevated concentration of CO2 has on the decay profile of the Delta VOC and original strain of SARS-CoV-2 at 90% RH. Inset is simply a zoom-in of the first 5 min of the x-axis. Elevating the [CO2(g)] results in a significant difference in overall decay assessed using a one-sided, two-sample equal variance, t-test (n = 188 (independent  samples)) of the Delta VOC from 2 min onward, where the significance (p-value) was 0.007, 0.027, 0.020 and 0.005 for 2, 5, 10 and 40 min, respectively." Other figures show differing results for other variants which seem to have different levels of pH-sensitivity. This acts in addition to - and is not to be confused with - the generally more important (as far as I know) fact that indoor CO2 readings serve as a proxy for proportion of rebreathed air and thus aerosol concentrations in the absence of active air filtration.  An interesting research direction would be to look at likely future

Trump recently said in an interview (https://time.com/6972973/biden-trump-bird-flu-covid/) that he would seek to disband the White House office for pandemic preparedness. Given that he usually doesn't give specifics on his policy positions, this seems like something he is particularly interested in. I know politics is discouraged on the EA forum, but I thought I would post this to say: EA should really be preparing for a Trump presidency. He's up in the polls and IMO has a >50% chance of winning the election. Right now politicians seem relatively receptive to EA ideas, this may change under a Trump administration.

Longtermist shower thought: what if we had a campaign to install Far-UVC in poultry farms? Seems like it could: 1. Reduce a bunch of diseases in the birds, which is good for: a. the birds’ welfare; b. the workers’ welfare; c. Therefore maybe the farmers’ bottom line?; d. Preventing/suppressing human pandemics (eg avian flu) 2. Would hopefully drive down the cost curve of Far-UVC 3. May also generate safety data in chickens, which could be helpful for derisking it for humans Insofar as one of the main obstacles is humans' concerns for health effects, this would at least only raise these for a small group of workers.

I think there hasn't been enough research on iota-carageenan nasal sprays for prevention of viral infection for things more infectious than common colds. There was one study aimed at COVID-19 prophylaxis with it in hospital workers which was really promising: "The incidence of COVID-19 differs significantly between subjects receiving the nasal spray with I-C (2 of 196 [1.0%]) and those receiving placebo (10 of 198 [5.0%]). Relative risk reduction: 79.8% (95% CI 5.3 to 95.4; p=0.03). Absolute risk reduction: 4% (95% CI 0.6 to 7.4)." There was one clinical trial afterwards which set out to test the same thing but I can't tell what's going on with it now, the last update was posted over a year ago. So we have one study which looks great but could be a fluke, and there's no replication in sight. The good thing about carageenan-based products is that they're likely to be safe, since they're extensively studied due to their use as food additives and in other things. From Wikipedia: "Carrageenans or carrageenins [...] are a family of natural linear sulfated polysaccharides. [...] Carrageenans are widely used in the food industry, for their gelling, thickening, and stabilizing properties." See this section of the article for more. If it really does work for COVID and is replicated with existing variants, that's already a huge public health win - there's still a large amount of disability, death and suffering coming from it. With respect to influenza, theres's some evidence for efficacy in mice and the authors of that paper say that it "should be tested for prevention and treatment of influenza A in clinical trials in humans."  If it has broad-spectrum antiviral properties then it's also a potential tool for future pandemics. Finally, it's generic and not patented so you'd expect a lack of research funding for it relative to pharmaceutical drugs.

A lot of people have said sharing these notes were helpful, so sharing it here on the EAF! Here are notes on NTI | bio’s recent event with Dr. Lu Borio on H5N1 Bird Flu, in case anyone here would find it helpful!

Quote from VC Josh Wolfe: https://overcast.fm/+5AWO95pnw/46:15

There is a natural alliance that I haven't seen happen, but both are in my network: pandemic preparedness and covid-caution. Both want clean indoor air. The latter group of citizens is a very mixed group, with both very reasonable people and unreasonable 'doomers'. Some people have good reason to remain cautious around COVID: immunocompromised people & their household, or people with a chronic illness, especially my network of people with Long Covid, who frequently (~20%) worsen from a new COVID case. But these concerned citizens want clean air, and are willing to take action to make that happen. Given that the riskiest pathogens trend to also be airborne like SARS-COV-2, this would be a big win for pandemic preparedness. Specifically, I believe both communities are aware of the policy objectives below and are already motivated to achieve it:   1) Air quality standards (CO2, PM2.5) in public spaces. Schools are especially promising from both perspectives, given that parents are motivated to protect their children & children are the biggest spreaders of airborne diseases. Belgium has already adopted regulations (although very weak, it's a good start), showing that this is a tractable policy goal. Ideally, air quality standards also incentivize Far UVC deployment, which would create the regulatory certainty for companies to invest in this technology. Including standards for airborne pathogen concentrations would be great, but has many technical limitations at the moment I think.   2) Public R&D investments to bring down cost & establish safety of Far UVC Most of these concerned citizens are actually aware of Far UVC and would support this measure. It appears safe in terms of no radiation damage, but may create unhealthy compounds (e.g. ozone) by chemically reacting with indoor air particles.  I also believe that governments have good reasons to adopt these policies, given that they would reduce the pressures on healthcare and could reduce the disease burde