Questions tagged [coronavirus]

The tag has no usage guidance.

Filter by
Sorted by
Tagged with
24
votes
1answer
1k views

What are the environmental conditions for SARS-CoV-2 to survive?

What do we know about the environmental limits for nCoV to survive outside the body? For example, in: In open air On surfaces In water What are the limits for temperature, humidity and air pressure,...
13
votes
2answers
670 views

Why are bats the source of dangerous coronavirus pandemics?

Why do coronaviruses come from bats? I mean, why precisely coronaviruses and not (for instance) herpesviruses? It looks like bats host more zoonotic viruses (per species) than rodents, although they ...
7
votes
1answer
6k views

What is the size (diameter) of the SARS-CoV-2 virus?

You can easily find a lot of pictures of the SARS-CoV-2 virus. But although it should be trivial for an electron microscope to measure the size, I am not able to ...
14
votes
2answers
861 views

Human Immune Response to COVID-19 Virus

I have tried to find an answer to this but have not found anything after multiple attempts. The question on the table is if the human body is able to produce an immune response to the COVID-19 virus ...
10
votes
2answers
344 views

How do bats survive their own coronaviruses?

How do bats survive their own coronaviruses (without showing any symptoms)? Or, more generically, how can viruses keep reproducing inside healthy carriers without inducing any pathogenic effect? Are ...
13
votes
3answers
825 views

What are the implications of tigers being susceptible to SARS-CoV-2?

It was recently reported that a handful of tigers and lions tested positive at the Bronx Zoo for SARS-CoV-2 (see here and here). Does this imply that the SARS-CoV-2 strain in humans mutated into a ...
3
votes
1answer
204 views

Where can I find the genome of the L-strain coronavirus and the S-strain coronavirus?

I read an interesting article about two strains of the coronavirus: https://www.newscientist.com/article/2236544-coronavirus-are-there-two-strains-and-is-one-more-deadly/ I would like to know how the ...
0
votes
1answer
123 views

Why is ACE2 not used as drug against covid? [closed]

Can ACE2 be produced and used as drug against covid? I read it is the receptor molecule. If it is in the organism the virus should bind to it and could not attack cells anymore? Is that right?
98
votes
3answers
16k views

What's the evidence against SARS-CoV-2 being engineered by humans?

A couple of colleagues suggested in a discussion that the virus that causes COVID-19 appears to be made by humans, since nature could not have produced such an efficient virus — that spreads so fast ...
59
votes
2answers
12k views

Are the social-distancing measures implemented against SARS-CoV-2 also suppressing the spread of other viruses?

With social-distancing measures being implemented in many countries I would expect other viruses, like the ones that cause seasonal flus, to have also a hard time propagating in these circumstances. ...
24
votes
1answer
3k views

Loss of taste and smell during a SARS-CoV-2 infection

In France the loss of taste and smell (la perte du goût et de l'odorat) is considered as one of the key symptoms of a SARS-CoV-2 infection (although googling shows that it is considered less ...
12
votes
3answers
357 views

Do mRNA vaccines cause transfected cells to be killed by cytotoxic T cells?

Based on my research on how mRNA vaccines (specifically for COVID-19) work: An mRNA sequence, that contains the sequence of the coronavirus spike protein, is absorbed by some cells. These cells now ...
1
vote
1answer
322 views

Is Covid-19 likely to mutate into a deadlier form?

When the Spanish influenza hit in 1918, it struck in two waves. The first wave was typical for a flu virus, targetting mainly elderly people, but the second wave was far deadlier and killed far more ...
10
votes
3answers
188 views

Why does increased humidity decrease coronavirus “survival”?

All news I can see scientist telling that the SARS-CoV-2 virus survive more in cold and dry weather. I can understand cold as hot weather will desiccate virus, but why dry weather. Would not dry ...
9
votes
1answer
908 views

Is COVID-19 claimed to get less deadly over time? If so, why?

From a TV news report of a press conference from (I think) the German Robert Koch Institute, I remember hearing an expert declare that he was expecting COVID-19 to get less deadly over time. ...
6
votes
1answer
208 views

Does SARS-CoV-2 kill its host cell or not?

Wikipedia says that Initial spike protein priming by transmembrane protease, serine 2 (TMPRSS2) is essential for entry of SARS-CoV-2.After a SARS-CoV-2 virion attaches to a target cell, the cell's ...
6
votes
1answer
158 views

What is the lipid membrane of SARS-CoV-2 made of?

SARS-CoV-2 is an enveloped virus: in structural diagrams it is drawn with membrane glycoprotein (M), envelope protein (E) and spike protein (S) embedded in a lipid membrane. What specifically is the ...
4
votes
1answer
121 views

Triangulation number of the SARS CoV-19 virus

Is the triangulation number of the SARS CoV-19 virus capsid, in the sense of the Caspar-Klug theory, known? In case the Caspar-Klug theory does not apply to it, is it known what is its tiling, in ...
2
votes
1answer
147 views

Can Covid-19 (similarly to HIV) infect T-Cells?

I'm interested in better understanding this Nature publication, discussing the potential for Covid to infect t-cells. After describing the results they conclude: "Based on the results of pseudovirus ...
2
votes
0answers
159 views

Paper shows 2 hours of high humidity and hot temperatures kills corona virus, does this stop the spread of the virus?

I found this paper (https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2863430/) which says these corona virus strains live for months at 4 degrees C, 20% relative humidity. But at 40 degrees C and 80% ...
0
votes
2answers
100 views

Why does the SARS-CoV2 virus not remain infectious forever? Or does it?

Given that the majority of biologists do not currently consider viruses to be alive, a virus can never die. It can, however, get destroyed by long exposures to soapy water, alcohol, and apparently ...
4
votes
2answers
449 views

Where can I find SARS-CoV-2 genome sequences for the UK?

I have downloaded and analysed the sequences of 832 complete samples from the European Nucleotide Archive but I cannot find a single one that was from the UK. I have also tried Genbank and they do not ...
3
votes
1answer
84 views

Can spike protein induced cell fusion be triggered by the mRNA vaccine?

The mRNA-based vaccines cannot lead to COVID-19 or its symptoms since they only lead to the production of the spike protein in the cell. However, the spike protein itself can lead to cell fusion: ...
2
votes
1answer
158 views

The fastest vaccine developed is a mumps vaccine, which took 4 years. Where is the hope that we will find a COVID vaccine in less time?

I understand that doctors and scientists are working hard to find a vaccine, but is there a reasonable chance that we will find one in the time that scientists and politicians are suggesting? I also ...
2
votes
1answer
94 views

Need for -70 degree temperature for Corona vaccine

Recent news of Pfizer vaccine for corona needing -70C temperature, made me thinking why such a low temperature is needed for mRNA based vaccine? Are there other vaccine around which need such a low ...
2
votes
1answer
155 views

Viral mutation rates and replication

TL;DR What's the relationship between the following? Mutation rates (expressed as "mutations per year" for a virus like e.g. COVID-19 (SARS-CoV-2). E.g. this article mentions "The rate ...
1
vote
0answers
132 views

How do viruses die outside of host cells? [duplicate]

I am posting a question that a friend of mine has asked. My friend wrongly assumes that SARS-CoV-2 virus can be transmitted through blood, although there is no such evidence. However, his question ...
0
votes
2answers
89 views

Does a critical mass of infected individuals exist after which mutations will overtake vaccination attempts?

As we know, all organisms have a probability to undergo mutations when they replicate. For every infected individual with the Covid-19 their bodies are environments in which the SARS-CoV-2 may mutate ...
0
votes
2answers
82 views

What specific markers does a Covid-19 PCR test look for?

I've done a search and can't find anything as to what specifically makes a Covid-19 positive that identifies it as unique. I would expect to see something like this: https://madridge.org/journals-...
0
votes
1answer
53 views

Are specific primers or detectors, or both, used in COVID-19 tests?

I am trying to learn about the rRT-PCR testing procedure used to test for COVID-19, but I am slightly confused on one point. Are highly specific primers used with a non-specific detector, or are ...
-1
votes
2answers
62 views

How can I classify the 3 clades(S, G, V) of the coronavirus that are found on GISAID?

On GISAID they classified the corona using 4 clades(S, G, V, Other). I would like to know exactly how these genomes were classified for my research. So how do you classify a coronavirus genome as ...
-1
votes
3answers
296 views

Explain asymptomatic viral infection (ie covid) with no symptoms

There are a lot of people that are testing positive for covid that have no symptoms (ie they are asymptomatic). This raises the question - does the current test have an unacceptably high rate of ...