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Questions tagged [coronavirus]

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Is Coronavirus killing by aggravating the immune system?

The widespread Covid-19 is affecting the elderly the most. The reason being given for this is that they have a weak immune system. However, what is surprising is that the virus is not affecting ...
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1answer
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Can you be infected by two coronaviruses at once?

E.g. could you be infected by COVID-19 as well as a different strand of coronaviruses (e.g. those that circulate in the population every flu season)?
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If the covid-19 appeared once, could it reappear anytime?

Governments are imposing confinement measures on their populations, trusting that if there is no more transmission the virus will die out. But since this coronavirus appeared a first time, what could ...
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1answer
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Is COVID-19 more deadly than swine flu?

I have a question about the novel coronavirus and swine flu. How do the death rates compare between the two diseases? How do the transmissions and rate of transmission compare? Was a vaccine ...
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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 ...
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L strain of SARS-CoV-2?

Early in the epidemic, Chinese researchers (Jian Lu, et al,) reported in the National Science Review earlier this month that there was an aggressive more virulent L strain compared to the older S ...
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1answer
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What differentiates diseases like Covid-19 and Polio from the common cold

Why are vaccines required for our body's immune system to destroy viruses that cause the likes of Covid-19 or Polio, while viruses that cause the common-cold are self-limiting (go away on their own)? ...
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1answer
133 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 ...
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1answer
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Why don't anti-viral drugs like “Acyclovir” work against coronaviruses?

I've always used Acyclovir to treat cold sores, why doesn't it work on other viruses? How do coronaviruses differ from herpesviruses?
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Why are victims of Covid19 being wrapped in plastic?

Several articles describe the unique ways Covid-19 patients are being buried. For example, in this Reuters article about Israel: These included decontaminating and hermetically wrapping bodies in ...
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What gene targets associated with the new coronavirus (SARS-CoV-2) have been identified so far?

One hypothesis for which we have some supporting evidence is that the new virus (SARS-CoV-2) "enters human cells through an interaction with angiotensin-converting enzyme 2" see here. Although it is ...
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Could blood transfusions from COVID19 surviver be worth researching as a possible form of treatment

As a general viral immunology question (rather than seeking personal medical advice). Would a blood transfusion from a COVID19 surviver to a sufferer be worth researching as a possible form of ...
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Can COVID-19 affect a person a second time?

I keep hearing people are recovering from COVID-19 virus. Is there any chance that same person can become infected with COVID-19 for a second time?
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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 looks to be ...
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How is the protease inhibited by lopinavir different in SARS-CoV-2 compared to SARS-CoV?

The protease inhibitor lopinavir, originally developed as a cure against AIDS and HIV, has been shown efficient against SARS Coronavirus SARS-CoV. Dayer M R, Taleb-Gassabi S, Dayer M S. Lopinavir; ...
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1answer
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How does sunlight affect the longevity of SARS-CoV-2 on surface?

UV radiation is known to degrade most viruses rather quickly. How does the UV radiation from sunlight affect the longevity of SARS-CoV-2 on surfaces. Of particular interest to me is the virus' ...
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1answer
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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 ...
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Does a higher body temperature slow the corona virus down?

The corona virus appearantly does not like high temperature: High Temperature and High Humidity Reduce the Transmission of COVID-19 Also it seems that higher body temperatures helps the immune system ...
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223 views

Is the CDC's reported drop today in COVID-19 cases by date of diagnosis meaningful?

I was waiting with bated breath for the CDC update on cases of COVID-19 in the U.S. by date of onset. To my eyes this looks like absolutely wonderful news - that it means that the exponential growth ...
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1answer
133 views

Using decoy proteins to treat viral illness

As a non-biologist, my understanding is SARS-CoV-2 uses it spike protein to latch on to the ACE2 receptor on cells in order to inject its genetic material into the cell. Questions: What would happen ...
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How is someone being tested positive for corona virus? [duplicate]

How is it determined that someone is infected with corona virus ? It is my searching for matching DNA sequences of the virus in our cells or is their some other way.
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Can stomach acid destroy a virus?

I was reading about a viral list of dubious coronavirus tips on The Verge and reached this tip: “Even if the virus gets into your mouth, drinking water or other liquids will wash them down ...
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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 ...
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1answer
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What percentage of individuals infected with COVID-19 don't have symptoms?

There are various statistics estimating mortality of COVID-19 infections, based on how many diagnosed people have died. These numbers are used by various media to extrapolate how many people will die ...
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How does increased relative humidity change the airborne survival rate of coronavirus COVID-19?

I would like to make some HVAC recommendations in my community to assist in slowing the eventual spread of coronavirus COVID-19. Some recommendations are obvious like properly maintained HEPA ...
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Ratio of bleach to water required to disinfect COVID-19?

I am confused about the needed ratio of bleach to water required to disinfect COVID-19 from surfaces. The guide on CDC states that: https://www.cdc.gov/coronavirus/2019-ncov/community/home/cleaning-...
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Could total 2020 flu deaths be low due to Covid19 countermeasures?

A working assumption is that Covid19 countermeasures will also reduce seasonal flu transmission and mortality. Could this effect be so large that the 2020 total global deaths from both causes will be ...
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How to avoid the Corona virus on our purchases?

I am concerned with the current epidemic of Corona virus, but I guess my question can apply to other epidemics. There is much information made available on various prophylactic measures to prevent the ...
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Role of Prevalence in Estimating Coronavirus Mortality

Let there be a sample of 10,000 people. 100 of them have a fever. You test them for COVID19 and they all come out positive. 5 of them die, 9 of them end up in intensive care. The estimated mortality ...
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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 ...
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Poor Hygiene vs. Cross-species transmission?

Did a poor hygiene at wet Chinese markets add anything to equation to trigger critical mutation of COVID-19 helping it to transmit the virus from bats/pangolins to humans? If not, would it spread to ...
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Do Angiotensin II Receptor Blockers (ARBs) or other factors control the level of ACE2 expression? [coronavirus receptor]

Because ACE2 is used by SARS-NCoV-2 to enter the cell, I am curious what factors determine its expression. Interestingly, myocardial infarction increases ACE2 expression in the heart in an animal ...
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1answer
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How many times has SARS-CoV-2 mutated?

According to Coronavirus has mutated at least once The novel coronavirus that has infected thousands of people across the world may have mutated at least once — meaning there may be two ...
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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 ...
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1answer
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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. ...
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Does the genetic sequence of SARS-CoV-2 end with 33 A's?

Looking at the DNA (or RNA?) sequence of the Covid-19 virus here: https://www.ncbi.nlm.nih.gov/nuccore/MN908947.3 I notice it ends in 33 a's. Does the virus really look like that, or is it some ...
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1answer
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Can coronavirus contaminate public water systems? [closed]

It's been reported recently that people are panic-buying stuff as the coronavirus epidemic worsens. I've even noticed that the local grocery store is low on hand sanitizer, paper towels, and bottled ...
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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 ...
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Is it possible to artificially induce a 40°C fever in a controlled and safe manner? [closed]

In search for any possible new treatments for COVID-19, I am of the understanding that the SARS-nCoV-2 virus may suffer deterioration at high temperatures and high humidity, to perhaps weaken it ...
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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% ...
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How does a virus stick to a non-biological surface?

Recent events has triggered an renewed interest in understanding how a virus is able to stay on a surface. For sake of argument, let's assume we are dealing with a Corona-type virus. One can then ...
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How does a Coronavirus “test kit” work?

A number of countries are using test kits for detecting new cases of nCoV (2019-Coronavirus) and apparently China is running low. What exactly is in a nCoV "Test Kit" — How does it work? (Surely ...
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1answer
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Why would a 2019-nCoV protein sequence in the NCBI database match a protein submitted in 2018?

There seems to be a bit of a conspiracy theory brewing over some data in the NCBI database, and I don't have the necessary knowledge to make sense of it. It basically goes like this: Go to NCBI ...
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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,...
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How was 2019-nCoV (Wuhan coronavirus) identified so quickly?

It seems that from the first few cases to identifying 2019-nCoV as a new disease happened very quickly. How were they able to identify this as a new disease and not an outbreak of a previously known ...
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Can Coronaviridae mutate into something as dangerous as Flioviridae?

Can coronaviruses mutate to an extent to get as dangerous as fliovirusues such as Marburg viruses, Ravn or Ebola Zaire?
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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 ...
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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 ...

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