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3 views

What protection does T-cell immunity confer for Covid?

This preprint, which was just released today, says that while some of the Covid-19 variants evade antibody immunity, they do not evade T-cell immunity. It says that this is true both of T-cell ...
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1answer
9 views

Why do MRI Scan and CT Scan take more time than X- Ray?

I don't understand why do MRI Scan and CT Scan take more time than X- Ray? Depending on the size of the area being scanned and how many images are taken, the whole procedure will take 15 to 90 ...
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0answers
5 views

Might the lack of Flu this year cause a problem creating next years flu vaccine?

According to this article, the UK lockdowns have had the effect of virtually eliminating Flu. As most of Europe/ The World has seen similar lockdowns, my expectation is that this would be reflected in ...
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1answer
10 views

Is there commercially available MRI or CT that can be used for anthropometric rather than diagnostic purposes?

In research journals, there are often operationalisations of such terms as "muscle cross-sectional area", and "muscle volume", and "adipose tissue volume" by means of MRI ...
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0answers
31 views

Why is the new viral vector vaccine unable to modify human DNA?

Exactly the same question posed here, except with reference to the new Johnson and Johnson viral vector vaccine rather than mRNA. Why is the new mRNA vaccine unable to modify human DNA? I was able to ...
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0answers
24 views

Do lockdowns lead to more contagious and more deadly (Covid) virus mutations?

Reduction in social contact, without full restriction of social contact, creates an environment where the 'success' of a virus depends more on how infectious it is and less on how good it is at ...
1
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1answer
13 views

Meaning of “natural” in “high natural protein intake” in a consensus guideline on BH4 deficiencies

From the Consensus guideline for the diagnosis and treatment of tetrahydrobiopterin (BH4) deficiencies: Apart from BH4Ds, the differential diagnosis of HPA includes phenylalanine hydroxylase (PAH) ...
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0answers
16 views

Is there a simple way to quantify viral content beeing exhaled by a person potentially independent of the specific virus type?

As far as I have understood it, persons who have contacted virusses (that are to a substantial part transmitted through the air, such as covid-19) tend to be only or most strong infectuous during a ...
1
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1answer
26 views

Why is Candida Albicans not regarded as an STI if it can be passed back and forth during intercourse?

From sources such as here the consensus seems to be that Candida Albicans is not an STI, but can be "passed back and forth" if engaging in intercourse with the same partner. So, why would ...
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0answers
13 views

How to care of my sex health if I work in hot zone? [closed]

I fear that my sperm count decrease If I work in hot zone. How to care of health if I work in hot area? I work in steel factory, where radiation from hot bodies are frequent.
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19 views

Is there any reason not to vaccinate with more than one covid 19 vaccine?

Is there any reason NOT to vaccinate with more than one COVID 19 vaccine? For example, Pfizer in January and JNJ in April. Nothing returned via Google.
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0answers
16 views

Does the number of contacts people have follow some well known distribution?

In the context of contact tracing, I tried to find whether the number of contacts people have follows some well known distribution, e.g. Gaussian, Zipf etc. But I'm coming up empty. Were any such ...
2
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0answers
20 views

Number of subsequent infections per case / overdispersion of COVID-19

I am aware that SARS-CoV-2 shows overdispersion, that is that many infected people cause no subsequent infections, but a small number of people cause very many infections (superspreading). The best ...
1
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1answer
36 views

Antibodies in the immune system

There is so much in the popular media these days addressing “how long antibodies last”, but I’m rather wondering whether two things are being conflated. When someone speaks of “having antibodies”, it ...
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0answers
56 views

Are multiple shorter exposures less likely to reduce in infections of COVID-19 then one larger exposure?

At 15 separate days Alice spends 1 minute in close proximity of Carol, who is infected with COVID-19. Bob on the other hand spends 15 minutes on one day with Carol, who is infected with COVID-19. ...
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0answers
9 views

What's the difference between ophthalmia and conjunctivitis? [closed]

Is there any difference between these two words ? Which is better to use for general speaking?
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0answers
31 views

MD after PhD in Nuclear Engineering [closed]

I am a PhD in nuclear engineering with my main expertise being defense. For reasons that I won’t explain and that are not important to formulate an answer, either I will go back to civilian research ...
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0answers
13 views

Why both hypokinetic and hyperkinetic changes are seen in Parkinsons? [migrated]

In Parkinsons disorder the substanstia nigra pars compacta get affected and there is destruction of the dopaminergic neurons, which ultimately disturbs the direct and indirect pathways. Now we know ...
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1answer
20 views

Cause of death medical classification (diseases)

I have a data set with a variable titled "causes of death" examples of death include: "bronchitis, pulmonary apoplexy, pneumonia, convulsions, fever, alcoholism, atelectasis,  stomach ...
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0answers
15 views

Is there a working connection between the plant and soil microbiome and that of a person's [migrated]

I've recently learned that the plant takes up endophitic micro organisms and will deposit them on its seed giving the the seeds an inocculent so the seedling has a fast start in life with its own ...
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0answers
20 views

How important is lens curvature for eyeglasses? [closed]

I don't wear glasses myself but some of my family members do. My cousin recently got new glasses and she's been having trouble with them. She had been trying her best to use the new glasses because ...
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0answers
58 views

If I my thinking ability were to deteriorate due to consuming mercury, will any symptoms show up first or directly thinking skills will be affected?

Suppose I ate some amount of mercury, which is a substance, that may cause neurotoxic effects & hence decrease my thinking abilities– Those thinking abilities include: Speed of problem solving (...
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0answers
16 views

I just ate an entire tin of Altoids Strawberry Mints, and my stomach isn't acting normal [closed]

So, I found a tin of Altoids Strawberry Mints and I accidently ate the entire thing. Now, about 10 minutes later, I am experiencing constant bloating and diarrhea. Should I see contact a doctor, or ...
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0answers
12 views

Effects of anti-Rh(D) antibodies on the fetus

Rh disease is caused by the irruption in the fetal circulation of anti-Rh(D) antibodies. This only happens when there has been a prior exposure of the mother to Rh+ RBC. To prevent Rh sensitization ...
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0answers
26 views

COVID-19 vaccination second doses: why two doses and why the specified interval?

Certain COVID-19 vaccines such as the Pfizer BioNTech and Moderna are specified to be administered in two doses separated by a 21 and 28 day interval, respectively. My questions are: Why administered ...
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0answers
27 views

How can a pregnant lady have periods?

Grace Meachim, 32, from West Sussex, was unaware that she was 37 weeks pregnant as she had no visible baby bump, was taking her contraceptive pill "religiously" and still had periods. ...
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0answers
30 views

Can someone get mentally retarded suddenly? [migrated]

Can someone, after having anger to a large level or anxiety to a large level, develop mental retardation? In simple words, can someone being normal and mental sound, become mentally retarded in just a ...
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0answers
13 views

Skeletisation in space [migrated]

A space pod containing an astronaut drifts out to space and cannot be rescued. The space pod contains no insects, and the only bacteria present are those originally brought in by the astronaut. There ...
2
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0answers
103 views

Do teeth have some sort of memory?

I have used braces when I was younger and got my teeth properly aligned. However, the other day I noticed that one tooth seems to have changed its position. I read here that The longer the amount of ...
1
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1answer
50 views

Does mouthwash provide any benefits?

I have came across two questions on the topic, however they both seem to assume that mouthwash is beneficial. • How frequently should non-alcoholic mouthwashes be used? • How often should I use ...
-1
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0answers
9 views

How is a primigravida engaged at 37-38 weeks, but there is yet no cervical dilatation?

If the baby's head is truly engaged at 38 weeks in a primigravida, how is it that obstetricians can feel the presenting part of the fetus at the ischial spine if the cervix has not yet dilated? How is ...
-1
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0answers
15 views

Would 140 F ( 60 C) kill most or all ordinary bacteria in potable water?

As a result of unusually low temperatures and power interruptions many the water distribution systems of many municipalities have been disrupted in Texas. So many of them have issued warnings to boil ...
2
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0answers
17 views

Effects of Vitamin K2-7 on existing plaque

There are quite a few studies on the impact of vitamin K2 supplementation on calcification of the arteries. For example: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4566462/ https://www.ncbi.nlm.nih....
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1answer
22 views

How human placental lactogen (hPL) is associated with insulin resistance in pregnancy?

I am unable to understand the molecular mechanism of hPL induced insulin resistance. Sharing of relevant article/text would be of immense help.
-1
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1answer
21 views

Is their terminology for varying bone fracture severity?

I have done research on the various different types of bone fractures however I am not able to find any resources discussing specifically the severity of fractures. For example I had assumed that the ...
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0answers
20 views

Can foods one is not allergic to exacarbate other allergies?

Several physicians (incl. a professor of allergology) told me and insisted that people with allergies must avoid certain foods, such as citrus fruit, cocoa, chocolate, jams, lunch meats, all nuts, ...
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0answers
15 views

Could eumelanin taken orally darken skin?

Darker skin is desirable to some individuals for a variety of reasons: UV tolerance, reducing skin cancer risk, aesthetics. While a number of other approaches exist, mostly to which solar exposure ...
1
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1answer
33 views

What does “favorable pharmacological profile” mean?

In the context of a new drug going through trials, what does "favorable pharmacological profile" mean? e.g. YTX-7739, a potential disease-modifying therapy for Parkinson’s disease, was safe,...
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0answers
17 views

How durable is a human immunity to an adenovirus (at least specific serotypes)?

There are few SARS-Cov-2 vaccines that use adenovirus vectors as vehicles (human's Ad5, Ad26, chimps' ChAdOx1, probably something else). A side effect of such a vaccine is that an inoculated organism ...
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0answers
22 views

Pedestrian Car Collision - book research

I am writing a book in which my protagonist is hit by a car in a foreign country. Her injuries need to prevent her from traveling home for 4 to 6 weeks. And be in need of a person to care for her ...
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0answers
15 views

Are infrared lamps really effective for treating sinuses, headaches, etc.?

My parents have been using infrared lamps for a while now to treat sinuses, headaches (and other body parts) and for home treatment in general. I am wondering if these lamps are really effective in ...
1
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0answers
23 views

Timeframe of MMA / HCY response to Vitamin B12 supplementation

What is the timeframe one can reasonably expect for elevated serum Methylmalonic Acid and Homocysteine levels to be normalized by supplementation (e.g. 250 μg daily cyanocobalamin), assuming ...
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0answers
17 views

Why are tartar and stains more likely to occur on the lingual incisor surfaces?

The lingual surfaces of the incisors tend to accumulate more tartar and stains than any other location. I'm not asking about how to remove or prevent stains, etc. I'm asking why that specific area is ...
-1
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0answers
25 views

Are there medications where being allergic to them isn't a contraindication for taking them?

In the USA, consumer-directed advertising for prescription drugs seem to always include, among other warnings, a contraindication warning not to take them if you are allergic to them (e.g. "Don't ...
2
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0answers
31 views

By what mechanism did Sweden have a second wave of COVID-19?

I have often heard the theory that the waves in, for example, the UK, were caused by a harsh lockdown, followed by a release that kicked off the second wave. To my knowledge, Sweden did not relax its ...
4
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1answer
38 views

What are the most common ways that COVID kills?

Looking at the death counts for 2020 published on the CDC's website, total deaths "involving COVID-19" were 375,581, but total deaths "involving COVID-19 and pneumonia" were only ...
2
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1answer
51 views

Moderna vs Pfizer COVID-19 vaccine mechanisms

It is my understanding that both mRNA vaccines encode for a pathogen-like protein that prompts the immune system to bind to the simulated pathogen and render it harmless. Does the Pfizer and Moderna ...
1
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1answer
25 views

Are there any randomized clinical trials being conducted on TMPRSS2 inhibitors for Covid-19 treatment?

In a recent paper on why hydroxychloroquine doesn't really work against Covid-19, it's been demonstrated that SARS-CoV-2 is much better at taking advantage of TMPRSS2 at the cell membrane surface, so ...
-1
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0answers
32 views

Why is the increase in Covid-19 cases in India suddenly decreasing?

Context: It is a sudden trend now that in India the corona virus cases are decreasing (as of 2/11/2021) but I simply can not understand why this is happening. The reasons shown in news articles like ...
-1
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0answers
16 views

Executive cognitive functions

I've been reading online about brain tumors and stumbled upon this page : Pagelink what caught my attention is a section of this page talking about Executive functions . My question is , are there any ...

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