Questions tagged [covid-19]
Describes the clinical disease caused by the SARS-CoV-2 virus
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What is the Fatality Rate of the Common Cold? [closed]
During COVID-19, we've heard many comparisons between SARS-CoV-2 and the Flu, especially in terms of the case fatality rate (CFR). Currently, the Flu is thought to be around 0.1%, and according to the ...
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Why Aren't There Any OpenSource/OpenHardware Ventilators?
During the COVID-19 pandemic, ventilators are in short supply. As an engineer, I am interested in learning the risks/challenges of designing an OpenSource ventilator. And how it could be tested for ...
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What are the clinical presentations of COVID-19 in Children, and what hypotheses are there to explain their relative immunity to fatal disease?
Out of nearly 45,000 confirmed cases in China through February 11, there was only one death in someone younger than 20, according to the Chinese Center for Disease Control and Prevention, and no ...
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Is there a graph over time of Covid-19 test positivity rate in the US?
Back in mid-April some commentary/news was that the US was not doing enough testing as evidenced by the test positivity rate:
America’s 20 percent positivity rate is disquieting. The U.S. did almost ...
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How long does it take for the COVID-19 antibody to disappear?
I saw a news article says; 90 days after the infection with ncov19, several patients had no detectable antibodies in their bloodstream. This seems to be one of their evidence that immunity against ...
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For what definition of "significant" is it true that "99 percent of [Covid-19] infected people have no significant illness from it"?
Hoover-affiliated physician Scott W. Atlas wrote:
More importantly, it was never a policy goal to eliminate all cases of COVID-19. That is impossible, unnecessary and illogical, when 99 percent of ...
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How do they test COVID-19 in drive-thru labs?
I've read that SARS-CoV-2 virus which causes COVID-19 disease can be tested with RT-qPCR.[1] It seems a somewhat lengthy procedure.
Then it's unclear to me: how do they test the virus in drive-...
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Is the washing hands in order to protect yourself from COVID-19 backed up by research?
I have been hearing a lot of people say that it is recommended to wash your hands thoroughly in order to maximise protection against COVID-19 infection. I also heard that the washing hands rumours are ...
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Why don't we take a random sample of the population to estimate the amount of COVID-19 cases?
Current statistics on number of cases will always be a few days behind reality due to the time between infection and going to get tested, asymptomatic people, etc. But why not take a random sample of ...
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Does a KN95 that says 'non medical' helps to protect against COVID-19?
I saw this type of face masks on a 'building tools' store (like home depot), and on the label said, among other things in chinese and english, non medical.
In this KN95 Masks Explained mentions
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Why are people with COVID-19 symptoms being denied tests in the US?
I have heard several times now, from both people I personally know and from others who have posted their stories online that they do not qualify for COVID-19 testing.
From the stories I have heard, ...
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Does COVID-19 cause myocardial infarctions?
I heard that NYC hospitals are seeing an increased cases of myocardial infarction with higher mortality than normal during this COVID-19 pandemic. What the connection is between COVID-19 and ...
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What is the meaning of "co-formulated"?
I was reading the The right drug for the right patient section of the University of Sydney website, which provides these clinical guidelines (flow chart), and says (bold my own):
There are no studies ...
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Why aren't mRNA vaccines being updated for new variants?
From what I understand, updating an mRNA vaccine is trivial. According to this answer, no or small clinical trials would be needed to update the vaccine, and updating production would also be trivial. ...
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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 ...
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Could the COVID-19 vaccine adversely impact healthy protein reception?
I'm not a health expert, just trying to understand possible long-term side effects of the vaccine, so if my terminology and thinking is off, feel free to correct.
The prominent vaccines right now are ...
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Why is the reported number of COVID-19 deaths lower on Sundays and Mondays in the US?
I was looking at the Daily Deaths from COVID-19 from Worldometers and I noticed that the number is always lower on Sundays and Mondays.
Why is that? Am I interpreting the graphs correctly?
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Is the day-of-week variance in COVID-19 case numbers a well-established phenomenon?
Right now (April 27), the JHU data on new COVID-19 cases in the US show a very distinct weekly rhythm; reports are lowest on the weekends and peak in mid-week. This isn't at all surprising — any ...
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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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(Why) doesn't Moderna's Covid vaccine have an INN?
Pfizer's and even more obscure mRNA vaccines that haven't been approved have an INN, which ends with -meran (e.g. CureVac's is "zorecimeran"). But as far as I can tell Moderna's vaccine ...
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Is there a simple plot comparing covid lethality to flu as a function of age?
There is so much arguing over covid-19 vs. influenza. I would like to have some solid data in my hands. Can anyone point to a simple graph of the following?
age vs. either CFR or IFR
with one line for ...
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Has China announced any results from their massive (new) COVID-19 testing program in Wuhan?
About 10 days ago China announced a plan to test the entire population (~11 million) of Wuhan. And more recently they've announced testing over 1 million per day in the city. But have any results been ...
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Do we have scientific evidence of immunity to SARS-CoV-2 at all? [closed]
There is still no scientific evidence of immunity to SARS-CoV-2, the novel coronavirus.
The serious virologist say:
“We don’t know yet “ ... “we can’t say “ “we hope “ “ we assume “
HILLARY ...
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Can computer programmers help to find a vaccine against corona?
How can a competition among computer programmers be helpful to find a vaccine against corona?
HackZurich, under the patronage of the Federal Department of Home Affairs (FDHA), aims to use the ...
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Is there an estimate of how many people infected with SARS-CoV-2 are asymptomatic?
A week ago spanish soccer team returned from Milan and 1/3 of the team members have been tested positive for Coronavirus, but none of them developed symptoms. They yet could develop since the ...
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How long should I stay isolated after I recover from COVID-19?
If a person gets COVID-19 and (hopefully) recovers at home without being hospitalized, how long should that person stay isolated before they can return to social interaction?
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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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Has increased Hand-washing during Coronavirus lockdown helped reduce transmission of the Common Cold & other Viruses?
One of the main preventative measures for Coronavirus currently recommended is standard hand-washing with soap and water for at least 20 seconds.
Anecdotally at least people have increased their hand-...
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Can SARS-CoV-2 be a potential cause for Guillain-Barré syndrome?
According to Wikipedia :-
...Although the cause is unknown, the underlying mechanism involves an autoimmune disorder in which the body's immune system mistakenly attacks the peripheral nerves and ...
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How can one predict whether an individual infected with the SARS-CoV-2 virus will be asymptomatic?
According to
https://english.alarabiya.net/en/features/2020/03/25/Coronavirus-Iceland-s-mass-testing-finds-half-of-carriers-show-no-symptoms, half of
the SARS-CoV-2 virus virus carriers show no ...
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Does immunity to some coronavirus confer any immunity to other strains?
Genetic sequencing of COVID-19 in China in December 2019 revealed two strains of the virus, identified as S and L, with S being the ancestral version while L was more prevalent (70:30 ratio) and more ...
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Is there a standard projection (or ensemble of proyections) about whether a second wave of COVID-19 will occur?
Several countries and states are leaving or have partially left the lockdown and, with constraints, are recovering economical activity after getting hit by the covid-19 crisis.
WHO has warned that ...
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Would facemasks reduce virus transmisions in vulnerable populations?
The US surgeon general has asked (tweeted) the public to not buy face masks, because the claim is that healthcare workers need them more.
CDC does recommend:
Facemasks should be used by people ...
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Why *exactly* are mRNA covid vaccines delivered intramuscularly?
I would like to understand what exact processes make intramuscular injection of particularly mRNA covid vaccines the best delivery option. I've asked doctors and googled, but I get contradictory ...
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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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What's the fastest COVID-19 test available?
This video 1 minute COVID-19 test talks about a 1 minute COVID-19 testing which isn't available to the public yet. In the market and online, you can find fast COVID-19 tests which deliver the result ...
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What are the effects of repeated sub-infective doses of coronavirus?
There are experimental records and clinical observations showing that exposure to sub-infective doses of some pathogens can result in enhanced immunity to infection when exposed to an infective dose ...
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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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Can mRNAs modify our DNA (publication misunderstanding)?
I am a bit confused about a publication (few month old) which seems to say that RNA can modify our DNA. The publication is the following one.
Unfortunately, I am not a medical expert (and even more in ...
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What is the difference between mutation and variant?
What is the difference between mutation and variant? News reports last week called Omicron a mutation of SARS-CoV-2; but this week they are calling it a variant and they are adding that it has a lot ...
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Are motorcycle helmets effective in preventing Corona?
Can a full-head helmet with the visor closed prevent getting infected by the Corona virus during a casual interaction with a carrier?
For example, when buying something at a store or discussing ...
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Is there a benefit of a COVID-19 vaccination if one had COVID-19 before?
I see the clear benefit of the vaccination if one didn't have the disease. However, there are a lot of people who had the disease already. So I assume they also have the anti-bodies?
Or is this a ...
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Why should/shouldn't one fear the long-term health effects of the Covid vaccines?
I'm aware that some people don't want to take a vaccine for Covid-19, and in fact some countries have suspended rollout of some vaccines due to some young people getting blood clots. Also some people ...
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Are there reliable studies on the viability of the SARS-CoV-2 virus with respect to temperature?
There have been "suggestions" (facebook, media etc) that the novel coronavirus is heat sensitive. Specifically that the virus is "killed" or impotent when subjected to temperature of 77F.
Are there ...
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If I microwave an infected piece of, let's say, cloth, for a minute or two, would it become disinfected?
This article suggests temperatures over 150 degrees Fahrenheit kill viruses. So, forgive my ignorance on the subject, but does this mean that if I microwave a potentially infected (i.e. with viruses ...
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What's the incubation period for COVID-19
My parents are both infected with the delta variant of COVID-19 and I have searched for the incubation period for that particular string.
But I couldn't find any answer. Delta variant is highly ...
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When somebody has ARDS, when is non-mechanical ventilation used, vs mechanical ventilation? (I'm talking no intubation, no sedation)
I'm a lay person.
When somebody has ARDS, when is non-mechanical ventilation used, vs mechanical ventilation?
(I'm talking no intubation, no sedation)
From what I understand, mechanical ...
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Safety data on chloroquine?
Prominent politicians in the USA have been calling for the use of both Chloroquine and Hydroxychloroquine in the management of Covid-19.
Day after day, the salesman turned president has encouraged ...
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Why won't COVID-19 just start spreading again once quarantine is re-opened?
COVID-19 pandemic started because 1 person had the virus, and then it spread to a lot of others.
Now, let's say your country imposed quarantine and distancing, and you managed to halt the growth of ...
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What are the risk factors currently thought important for disease severity in COVID-19?
I have heard of from reading numerous journal articles, and newspaper/TV reports:
age > 70
age < 5
obesity
smoker cigarettes or pot
male
blood group not group O
poor socio economic status
crowded ...
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