Recent comments in /f/science

swesley49 t1_j8eanb0 wrote

You can have a population where infections happen with no vaccines and get herd immunity. You can use vaccines we have now, infections still happen, and get herd immunity from the natural immunity from infections except that fewer people will be severely affected and dead because we know the vaccines make death and serious illness less likely. It's wild that you think somehow herd immunity is impossible in a world with these vaccines, but it is inevitable in a world where these vaccines don't exist.

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Bubbagumpredditor t1_j8eaj72 wrote

Makes sense that you would have this programmed at the subconscious level. If Todd is suddenly terrified because he saw a cave bear sneaking up on you you want your body to react NOW

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forests-of-purgatory t1_j8ea1q3 wrote

“Normal pacifier use during the first few years of life generally doesn't cause long-term dental problems. However, prolonged pacifier use might cause a child's teeth to be misaligned.” -Mayo clinic

“Pacifiers are not necessarily bad for your baby if they are weaned off of them before the age of two. After that, teeth start to develop, and oral health can be impacted.“ - oral surgery of utah

I said months in my other comment but apparently its a few years. Most places recommend pacifiers between ages 1-6 months to reduce SIDS risk anyways, just wean them off before oral development would be affected and its a win win

Edited like 3 times to figure out formatting, oh the difference a space makes

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hellomondays t1_j8e9tb3 wrote

It's worth mentioning that Auguste D. the woman from the case study that would lead to the "discovery" of Alzhiemer's was only 50 when she first became ill. Even from the start of scientific inquiry into this disease, there's a lot more going on than just old age.

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johnleeshooker t1_j8e9ooy wrote

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Seb278426 t1_j8e96dd wrote

Mdpi is a predatory journal publisher that will publish anything as long as they get paid. Just skimming over this study shows that it would have never passed any real review process in terms of quality of data and analysis.

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Wagamaga OP t1_j8e8ck5 wrote

The amygdala is a small, almond-shaped structure deep in the brain, located on the medial surface of the temporal lobe, which processes both positive and negative emotions. Brain scanning studies show that the amygdala is activated in response to fearful faces, even when they are not consciously perceived.

Previous studies did not measure brain activity in real-time, however, and so direct evidence for rapid fear processing in the amygdala was lacking.

A rare opportunity
Yingying Wang of Zhejiang University and her colleagues had the rare opportunity to record neuronal activity directly from the brains of 18 patients undergoing presurgical evaluation for drug-resistant epilepsy.

While neurosurgeons monitored their brain activity to identify the source of debilitating seizures, the researchers implanted microelectrodes into their amygdalae, visual cortices, and various other brain regions, and recorded the responses of individual cells to images of happy, fearful, and neutral facial expressions.

The researchers used low- and high-resolution images of the faces of 96 actors that were rendered invisible by a process called backward masking, in which each image is shown briefly, and then quickly followed by another image of the same color that does not contain a face.

Low-resolution images of fearful faces, but not of happy or neutral ones, evoked rapid cellular responses in the amygdala, but not in the visual cortex or other regions. The earliest responses of amygdala neurons occurred within one-tenth of a second, even though the patients were not consciously aware of having seen the images.

https://bigthink.com/neuropsych/brain-fear-unconscious-awareness/

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JurassicCotyledon t1_j8e86b1 wrote

I’ve never suggested that natural immunity doesn’t wane over time - although it does offer a more broad and durable immunity, meaning if you are exposed to subsequent variants, your immune response has a greater chance at offering protection, and your immune memory can be updated to recognize the contemporary variants in circulation.

Even if your immunity wanes, your lingering immune memory will allow your body to mount a more targeted immune response when compared to a first exposure to a novel virus.

We’re not talking about blocking infection. We’re talking about reducing death and serious illness.

You can attempt to avoid infection, although it’s unrealistic to effectively prevent while living a normal healthy life. Your best bet is to maximize your natural immune health, and focus on protecting the most vulnerable in society.

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mb_500- t1_j8e7dtk wrote

Your comment is such a gut punch. My son, contracted CoVid at age 7. He was incredibly sick with MIS-c and long CoVid for 8 months following. He contracted it again, 9 months after the initial infection and again, long CoVid for months following. His immune system was absolutely devastated and he caught everything. The vaccine wasn’t approved for him yet when he got it the first time and I’ll never forgive myself for not keeping him home. We failed our children and we don’t even understand the price they may have to pay years down the road.

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No-Menu-768 t1_j8e6nwo wrote

Did we really need the fMRI to confirm that racist jurors are... racist?

Edit: the research is actually about determining which parts of the brain are active during different types of decision making, primarily biased or distorted decision making. Sort of asking, "Do we have a racism lobe, and where is it?"

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