All of mfoley's Comments + Replies

mfoley30

We need a new model I think. The purpose of the IHME was to figure out how to allocate hospital resources at the peak. Now we are roughly at or past the peak and we need to figure out how to re-open and what calculated risks are worth taking to ensure that businesses don't get devastated even more. Hopefully someone is working on it.

1Yandong Zhang
Below is a simplified COVID-19 framework: Data acquiring ---> social engineering based on model ----> better result Yes. A better model will be definitely helpful. However, (as pointed out indirectly earlier by someone else), to my best knowledge, there were no good and robust model for large lag dynamic systems. Such kind of model could lead to Chaos and random like result easily. Thus, I believed that increasing the data acquiring capability was the key (South Korea's approach).
mfoley10

If there is ever going to be a cultural shift in this direction, now would be a logical time for it to happen. Boomers have had a disproportionate impact on the American zeitgeist at every phase of their lives. They are now getting to the age where their primary concern is likely to be their own mortality. Based on the way the Boomer generation is often portrayed as demanding a high quality of life for themselves, it seems possible that they will try to re-prioritize society to prevent their own deaths. I still don't take the idea seriously that this will happen but it's a point in favor of it.

mfoley30

Does the fact that 15% of cats had antibodies suggest that far more Wuhan residents were infected than the official totals? Officially I think only around 1 in 200 Wuhan residents were infected. It says that the cats were sampled from animal shelters or pet hospitals so maybe the workers there had to keep coming in every day to care for the animals even during lockdown and thus were more at risk.

4Elizabeth
Where do you get that the cats were sampled from shelters and hospitals? I see So hospitals and shelters were certainly part of the sample, but it seems like they also tested some human patients' cats.
mfoley30

My dad is an election law professor and he's been talking nonstop about this for weeks... this is his article on it

mfoley10

Both good points. Hopefully we get more tests of the sort reported soon.

mfoley10

Idris Elba and his wife, two weeks after testing positive for the coronavirus, say they still have experienced no symptoms

The pool of people who 1. received a test while asymptomatic 2. tested positive and 3. are updating the public about their condition through mass media seems very small to me. The fact that two of them are turning out to remain fully asymptomatic seems to indicate that this is in fact likely to be a common thing. Somewhat surprising imo.

2Joe Collman
Interesting. I suppose another possibility is that both tests were false positives. Unlikely assuming that false positives are independent - but is that a reasonable assumption here? It seems possible they'd be correlated - e.g. if the tests were picking up some other infection. Does anyone have a good understanding of this (in general, needn't be SARS-cov-2 specific)? Under what circumstances is it (un)reasonable to assume that false positives are independent?
mfoley70

We're finally getting some results on this. An antibody test in an Italian town an hour outside Milan has been done. 2000 people out of a population of 6169 have been tested.

Results: 13-14% of the population tested positive for the antibodies (~832 people).

The town had 27 confirmed cases, with 4 confirmed deaths. 6 deaths of all causes were recorded in March.

So this is arguably good news. It implies an IFR of about .5%. If the population here is older/unhealthier than average, as seems to be true for Northern Italy as a whole, then we could see tha... (read more)

1Remoddy
Very interesting, thanks. I think it's 13% of tests, not 13% of entire population of 6'169, so not 832. I don't speak Italian and struggle to find any details. Actually they didn't mention that all 2'000 samples were processed. On 5th April the mayor of the town posted a photo of newspaper mentioning "29% of 38 persons" positive. So I would not be surprised if they have taken blood from 2'000 people, processed 100 of them so far and this results got it to newspaper. Very promising (we get more test data!), but I wouldn't draw any conclusions on this yet.
5Lukas_Gloor
Someone in that twitter thread points out that with subtracting false positives, it implies that 10% would be the better guess, as opposed to 13-14%. Does that make sense? Then 4 Covid-confirmed deaths per 620 people would be 0.66%. And what about sampling bias? I read that the tests were voluntary. Unless someone was extremely meticulous about trying to somehow get a representative sample, I don't think it's reasonable to treat this as random. It's really quite obvious that people who had flu-like symptoms for a couple of days will be more curious to go among people and have a needle stuck into them. .
mfoley130

Ok, I will do it when I get a chance. If anyone knows any strategies for maximizing engagement on Reddit let me know so I can get a good sample size.

mfoley250

It might be a good idea to do a survey on /r/COVID19positive and ask people about symptoms in themselves vs their family members. If the correlation is strong enough that we need to worry about it we should be able to reveal it given enough data.

Possible list of questions:

  • How many people do you live with?
  • For yourself and each person you live with, provide the following:
    • Relationship to you and other members of the household
    • Age
    • Sex
    • Underlying health complications
    • Confirmed positive / experiencing symptoms / symptom-free
    • If experiencing symptoms
      • Date of symptom o
... (read more)
1[anonymous]
I would ask about testing: if there were any tests, when were the samples gathered, what were the results, what kind of test was used (RNA/antibodies), which country/institution performed the test (that last one might help infer what kind of test was used)
3Raemon
I think this is a pretty interesting idea.