Categories Health
Imagine you go to the doctor and get tested for a rare disease (only 1 in 10,000 people get it.)
The test is 99% effective in detecting both sick and healthy people.
Your test comes back positive.
Are you really sick? Explain below 👇
The most complete answer from every reply so far is from Dr. Lena. Thanks for taking the time and going through
Really doesn\u2019t fit well in a tweet. pic.twitter.com/xN0pAyniFS
— Dr. Lena Sugar \U0001f3f3\ufe0f\u200d\U0001f308\U0001f1ea\U0001f1fa\U0001f1ef\U0001f1f5 (@_jvs) February 18, 2021
You can get the answer using Bayes' theorem, but let's try to come up with it in a different —maybe more intuitive— way.
👇
Here is what we know:
- Out of 10,000 people, 1 is sick
- Out of 100 sick people, 99 test positive
- Out of 100 healthy people, 99 test negative
Assuming 1 million people take the test (including you):
- 100 of them are sick
- 999,900 of them are healthy
👇
Let's now test both groups, starting with the 100 people sick:
▫️ 99 of them will be diagnosed (correctly) as sick (99%)
▫️ 1 of them is going to be diagnosed (incorrectly) as healthy (1%)
👇
#FollowTheScience yes, but not just part of it!
THREAD👇
\U0001f534LIVE \U0001f4c5Today \u23f012:00 CET
— EU_HEALTH - #EUCancerPlan (@EU_Health) February 3, 2021
We are presenting today the #EUCancerPlan as part of a strong \U0001f1ea\U0001f1fa#HealthUnion
Follow the presentation live here: https://t.co/Cr8ATvzNkg#WorldCancerDay pic.twitter.com/zdByuklWV6
1/ Granted, some studies have pointed to ASSOCIATIONS of HIGH intake of red & processed meats with (slightly!) increased colorectal cancer incidence. Also, @WHO/IARC is often mentioned in support (usually hyperbolically so).
But, let’s have a closer look at all this! 🔍
2/ First, meat being “associated” with cancer is very different from stating that meat CAUSES cancer.
Unwarranted use of causal language is widespread in nutritional sciences, posing a systemic problem & undermining credibility.
3/ That’s because observational data are CONFOUNDED (even after statistical adjustment).
Healthy user bias is a major problem. Healthy middle classes are TOLD to eat less red meat (due to historical rather than rational reasons, cf link). So, they
4/ What’s captured here is sociology, not physiology.
Health-focused Westerners eat less red meat, whereas those who don’t adhere to dietary advice tend to have unhealthier lifestyles.
That tells us very little about meat AS SUCH being responsible for disease.
Surprisingly we simply don't know.
China would have all interest in clarifying that point if for instance they were prospecting or selling guano. It did not.
The miners were tasked with removing bat feces. AFAIK it hasn't been established why they were doing this. Given that EcoHealth was collecting bat fecal samples in the same province around the same time, is it possible these miners were actually collecting guano for EcoHealth?
— The Great Gumbino (@gumby4christ) February 15, 2021
What we know is that EcoHealth + WIV were sampling bat sites in the vicinity at the exact time of the workers being in that mine.
#DRASTIC wrote about this and about other oddities in the official story:
Maybe it's just one of these coincidences.
Then it gets interesting: about a year after the miners death, Olival & Epstein from EcoHealth Alliance co-authored a paper about the coronavirus risk infection from bat guano collection.
No mention of the
That paper oddly used some old bat samples collected by DARPA in 2006/7 at the famous Thai bat cave.
It never mentioned that the Thai monks have been doing this every Sunday for many many years without infection.
But most interestingly it never mentioned the Mojiang mine accident, even if the perfect timing and recycling of old DARPA bat samples seem to point to a likely knowledge of it.
Anyway, the idea was to ask for more money, as you correctly
What is the nature of our (evolved) relationship with viruses? We are literally flooded by them. Welcome to the human virome, with harmful but also beneficial members. Great paper in @sciam "The Viruses Inside You" https://t.co/aWszsNq61d pic.twitter.com/eFsoxV4M9K
— Ricard Sol\xe9 (@ricard_sole) December 12, 2020
What does it mean to treat our individuality as ecologies? We are all ecologies existing in other ecologies. Nature is constantly performing a balancing act across multiple scales of existence.
There are bacteria and viruses that are unique to your ancestry as that of your own DNA. They have lived in symbiosis with your ancestor and will do so for your descendants.
It is an empirical fact that the microbiome in our stomach can influence not only our own moods but also our metabolism and thus our weight and health.
It is also intriguing to know that brains evolved out of stomachs and that our stomachs contain hundreds of millions of neurons. Humans can literally think with their gut.