Questions tagged [coronavirus]

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Why are COVID nucleic acid tests sometimes reported with non-integer CT values?

I saw a positive COVID test, and the CT value was not reported as an integer value. Instead, it was reported with two decimal point precision. I expected the CT value to be the number of PCR cycles. I ...
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Can someone point me to a good, up-to-date review article on the effectiveness of vaccines against the omicron variant of the coronavirus?

I would like to learn about the effectiveness of vaccines against the omicron variant of the coronavirus. I believe a review article from a scientific journal would have the best information. I ...
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3 votes
0 answers
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How well does COVID vaccination protect against brain damage from COVID?

I have read that even mild infections with the Corona virus causes significant brain damage in a large number of cases: Could mild COVID symptoms lead to brain damage? Therefore, it is natural to ask ...
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smoking and coronavirus [closed]

In the beginning of the coronavirus pandemic, there was some noise about smoking being a risk factor when contracting coronavirus disease. Then there was a deafening silence. Beginning of 2022, what ...
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Is the WHO guideline on registering covid-19 deaths very expansive?

In this WHO guidelines document: Guidelines for certification classification of covid-19 as cause of death, it says: 2. DEFINITION FOR DEATHS DUE TO COVID-19 A death due to COVID-19 is defined for ...
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Is Covid-19 spike protein expressed outside the MHC when inducing syncytia formation?

"The SARS-CoV-2 S protein on the membrane of infected cells can promote receptor-dependent syncytia formation, relating to extensive tissue damage and lymphocyte elimination." Liu Wenzhong, ...
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1 vote
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The number of new cases of COVID

I have noticed that the number of new Covid cases in the United States is running roughly 100,000 per day and increasing. What percentage of those new cases are people that are fully vaccinated? In an ...
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Will the COVID-19 virus ever stop mutating into new variants? [closed]

I am curious to know if it has been discussed within the medical community as to whether the COVID-19 virus will ever stop mutating into new variants, and if it has been discussed, what is the ...
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1 vote
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Vaccine death efficacy calculation and how it works

I am no medical expert, am just curious how vaccines work in general, especially in preventing severe illness and deaths. I have read articles, seen videos on youtube, and seen how efficacy is ...
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COVID-19 exposure risk from passing joggers versus walkers

What is the COVID exposure risk from passing close by someone who is jogging relative to passing close by someone who is walking? The reason I ask is with regard to going out for exercise, or to run ...
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Why US (3 weeks)and UK ( 8 weeks) covid vaccine guidelines differs so much?

I read two differing opinions about corona, one from CDC that says get your second shot as close to the recommended 3-week or 4-week interval as possible Other from BBC UK, that says Covid vaccine: ...
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Can lung imaging uniquely identify coronavirus-induced pheumonia?

How reliable are radiographic, CT and ultra-sound appearances of coronavirus in the lungs in terms of their sensitivity/specificity? A bunch of imaging labs popped up in my town recently, all of them ...
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CDC close contact definition - why masks addressed only in K12 setting?

CDC defines close contact as Someone who was within 6 feet of an infected person (laboratory-confirmed or a clinically compatible illness) for a cumulative total of 15 minutes or more over a 24-hour ...
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1 vote
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What is the state of transmissible vaccines?

I was thinking about viral gain of function research -- and firebugs playing with matches -- when it hit me: if a highly contagious, but harmless version were engineered it could outcompete more ...
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How effective is sinovac/sinopharm vaccine

it's time for me to get vaccinated with sinovac vaccine. I am actually a little bit nervous, about its effectiveness, I am not a docotor and I have no idea what's behind it. I am worrying that it ...
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When speaking of vaccine efficacy (for COVID-19, or other), is immune response or efficacy really being measured? [duplicate]

I've been performing many web searches using combinations of the words "vaccine", "vaccination", "COVID-19", "coronavirus", "efficacy", and "...
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3 votes
2 answers
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Is there evidence that vaccine-related blood clots could be due to injection technique?

Recently, Danish health authorities including Denmark's SSI issued new guidelines for intramascular vaccination to be done with aspiration, in case some of the vaccine-induced blood clot cases are due ...
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What are the "theoretical risks" of COVID vaccines in mothers

In Germany, there is no official endorsement of COVID mRNA vaccines for pregnant women and nursing mothers due to a lack of study data. Still, professional societies generally recommend considering ...
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1 vote
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Are coronavirus-like spikes only seen in viruses?

Are there any natural proteins or cells (or anything) made by the human body with spikes like those of Covid-19? I know that there have been no serious side effects reported from the Covid-19 vaccine, ...
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How accurate is the individual number covid-19 variant cases in each state?

How accurate is the individual number of covid-19 variant cases in each state? US COVID-19 Cases Caused by Variants I am trying to estimate the risk of being exposed to the one B.1.351 variant where ...
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Can COVID-19 vaccines cause birth defects?

Have regulators historically allowed enough time for Phase 3 trials to show that a vaccine does not cause congenital defects? Are they making an exception for Covid vaccines? Because the Pfizer/...
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How does the type of syringe impact the number of doses of Corona vaccine available per vial?

In an interview with Ron Klain (Biden's Chief of Staff) on CNN this morning, it was suggested that Biden would invoke the National Defense Production act to increase the production of syringes that ...
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What are specific effects of a loss ACE2 functionality caused by COVID-19?

ACE2 protein on the surface of lung epithelial cell and and other cell types is a homologue to ACE which is popularly as the target protein/enzyme of blood pressure medication ("ACE inhibitors&...
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If HCoV-NL63 also binds to ACE2 (like SARS and SARS-CoV-2) why doesn't it cause a more severe disease (on one hand) or a pandemic (on the other)?

By all accounts the "common cold" virus HCoV-NL63 although much further away (genetically) from SARS and SARS-CoV-2 it actually uses the same ACE2 receptor for entry (or at least the S1A ...
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Why is the new mRNA vaccine unable to modify human DNA?

One of the most common worries expressed against the new coronavirus vaccine is that, supposedly, injecting mRNA into a cell has the potential to alter the human genome. I am constantly bombarded by ...
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COVID-19 Variants

I have been looking at this "new variant" of the virus which causes COVID-19 and the British Medical Journal has said What do we know about this new SARS-CoV-2 variant? It’s been snappily ...
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Have there been vaccines in the past, which revealed side effects only after extended periods of times? [duplicate]

Obviously we don't have precedent for mRNA vaccines like the now available SARS-CoV-2 vaccine from German-American Joint Venture Biontech/Pfizer. But how about the other, more conventional vaccine ...
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Can an individual who has had a covid-19 vaccination test positive and is that a problem?

Can an individual who has had a covid-19 vaccination test positive and is that a problem? Up to now and for some time to come, testing has been important to help control the spread of this disease. ...
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1 vote
1 answer
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Is repirator easier to breathe through than conventional medical mask?

Currently I'm using conventional blue mask. But there are masks with exhale valve (there are mostly FFP2 ones and they're cheaper, I'm considering to buy one, for COVID protection). I didn't try such ...
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UK - Sweden Covid-19 Comparison

I compared Covid-19 data on the 17th of October 2020, using this source: https://coronavirus.jhu.edu/map.html UK population = 66650000 Uk cases = 708297 UK deaths = 43669 66650000 / 708297 = 1 ...
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2 votes
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How effective are reused surgical masks?

Let's say I have used a surgical mask multiple times. And say I left it on a safe place, untouched, for three days which is the longest that viable SARS-CoV-2 has been found on different materials (...
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1 vote
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Are COVID-19 patients infectious even if test results are negative?

With Covid-19, are people infectious in the first days after infection before they test positive on a Covid test? I have learned that Covid-19 tests are ineffective in the first few days after being ...
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What is the statistical power required for COVID-19 vaccine trials?

Clinical research selects the number of subjects under treatment based on desired statistical power (i.e. the probability of rejecting the null hypothesis when the null is in effect false, given a ...
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1 vote
1 answer
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What happened to Solidarity?

Solidarity is a large clinical trial of treatment candidates for COVID–19, organised by the World Health Organisation (WHO). The relevant page on the WHO website—last updated on July 6, 2020—says: The ...
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How many of those exposed to COVID-19 get infected?

Statistically, from 100 people exposed to the coronavirus that causes COVID-19, how many get infected? Say for example in the USA. Since they talk about exposed people, then such cases should be ...
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corona virus vaccine side effects [closed]

First I like to mention that I have no medical background I have read that there are 2 types of vaccines for the corona virus currently developed A RNA based vaccine, which is based on a novel ~...
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4 votes
1 answer
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Can this method of immunization for horses serve as a COVID-19 vaccine for humans?

A group of scientist developed Equine polyclonal antibodies (EpAbs) obtained after immunization of horses with the receptor-binding domain of the SARS-CoV-2 viral Spike glycoprotein. https://ri....
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1 answer
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Do presymptomatic people test PCR-positive

I know that RT-PCR testing can detect coronavirus in symptomatic and asymptomatic carriers. I was wondering whether a presymptomatic carrier (I don't know if the terminology is correct, but I mean ...
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2 answers
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How would we run experiments to determine the prevalence of aerosol COVID19 spread (long time and long distance) versus droplets?

The droplets vs aerosol debate for COVID19 is heating up. WHO has revised it's aerosol evidence review here: https://www.who.int/news-room/commentaries/detail/transmission-of-sars-cov-2-implications-...
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How accurate are dogs to detect whether a human has COVID-19?

I read on https://www.businessinsider.com/sniffer-dogs-answer-to-the-covid-19-testing-crisis-mirror-2020-4: Medical detection dogs able to sniff 750 people an hour could help identify coronavirus ...
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1 vote
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Can SARS-CoV-2 possibly overcome herd immunity without mutation in densely populated countries and places? [closed]

Can the coronavirus that causes covid-19 possibly overcome herd immunity without mutation using immune individuals as hubs till it reaches vulnerable individuals in very densely populated countries ...
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Can Lysine supplement increase immunity against corona viruses? [closed]

Can high doses of Lysine as a supplement or from a natural source (e. g. drinking 1-2 letters of yogurt daily) increase immunity against corona viruses? What about a combination of Lysine and an A-Z ...
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Is there data on the effectiveness of masks for preventing COVID-19 transmission in outdoor settings?

In the COVID-19 pandemic, many jurisdictions are now requiring that masks be worn in public, often including both indoor and outdoor settings. However, many sources (including widely cited preprints ...
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How did COVID-19 jump the species barrier?

I am not a medical professional. I also do not have enough knowledge on medicine or biology. But I have been wondering a lot about one question in particular for some time: How did COVID-19 jump the ...
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2 votes
1 answer
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How long does coronavirus stay alive on home floors?

I'm not saying that the floor is wet. But I feel even when our shoes or dry, it can carry virus with it and may get attached to floors. If this happens, how long it can stay on the floor tiles of a ...
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Why does there seem to be such a big difference in covid case mortality between the USA and Europe?

At the time of writing (11 July 2020) the USA have almost 3.2 million confirmed cases of coronavirus infections, while Europe has slightly over 1.8 million with the USA passing Europe around 10 May ...
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Will preventive measures of COVID-19 pandemic ever lessen to a great extent in the most parts of the world? [closed]

People always say in hard times that "this too shall pass". Is it right for COVID-19 pandemic (please see what I mean by pandemic here. My English is a bit weak so this word might not be ...
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1 answer
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For the people who are treated with interferons, does this provide them extra protection against corona virus?

It is known that interferon inhibits the viruses replication process. At the same time, they don't give it to people with COVID-19 because we don't want the flu-like symptoms to get worse. How about ...
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1 vote
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How to disinfect ice cream from coronavirus?

It is well known that some ways to remove coronavirus from food are: washing/cleaning it carefully; heating it (e.g. in oven, microwave or a saucepan), at least 70 degrees for at least 5 minutes; ...
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0 votes
1 answer
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Epidemiological characteristics of SARS-CoV-1

SARS-CoV-1 and SARS-CoV-2 seem very similar in terms of their nature and the way in which they entered the human population. SARS-CoV-1 appears to have been driven to extinction, but SARS-CoV-2, which ...
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