Questions tagged [covid-19]
Describes the clinical disease caused by the SARS-CoV-2 virus
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COVID-19: Natural infection compared to vaccination
It is often stated that getting infected gives a lesser immunological protection from covid, than a vaccine, but studying immunology.org - I'm getting the feeling that the immunization is merely more ...
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Are false negative/positive results of COVID tests independent probabilistic events?
The gist of it
Though there are many types of Covid tests, I think none have 100% sensitivity or specificity. What I would like to know is if the event of getting, e.g., a false negative on two tests ...
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Are there adverse health risks to taking multiple COVID vaccines?
Not counting the intended double dose of the 2-dose vaccines such as Moderna and Pfizer.
I can imagine this in several instances. Say someone threw away their vaccine card after the second shot, and ...
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Why does the Pfizer’s Covid vaccine cause more intense intense symptoms after second shot then after the first shot?
cnbc.com (mirror) mentions:
The FDA says Pfizer’s Covid vaccine is safe and effective. But trial participants warn of intense symptoms after second shot.
Why does the Pfizer’s Covid vaccine cause ...
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Why isn't the mRNA in covid-19 vaccines taken up by all types of cells?
I'm familiar with the basic principles by which the moderna/pfizer vaccines work. I'm confused about how the vaccines are able to make sure that mRNA is only taken up by dendritic cells. If mRNA is ...
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Are there any educated guesses related to the type and probability of severe side effects caused by the COVID-19 vaccines?
Multiple countries have already started the COVID-19 vaccination.
Local media covered this extensively and I saw that many medical doctors and researchers arguing that the vaccines are very safe ...
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Why do we seemingly not know how COVID will behave during winter, when it was winter in much of the world?
(Not sure if this is the right SE for this question)
Why COVID Outbreaks Could Worsen This Winter
Baker has tried to tease apart the effect of climate on the seasonal pattern of cases during the ...
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What does "pause" mean in Covid19 Vaccine Clinical Trials?
Johnson and Johnson as well as Astra Zeneca recently announced that they were going to "pause" in their respective clinical trials for a Covid19 vaccine.
What exactly are they "pausing&...
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What is the definition and significance of administration of "Compassionate Use Drug"?
There seems to be some conflict about the use of "Compassionate Drug Authorizations".
Does the request and use of such a drug indicate that a patient is in extreme danger?
Barkground:
The ...
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Is it true that half of the COVID-19 patients, even seemingly without symptoms, obtain serious heart damage?
In this video, complex systems expert and physicist-turned-epidemiologist Yaneer Bar-Yam claims that according to recent findings, about half of the people that have been infected with COVID-19 will ...
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Is Covid-19 spread by exhaled cigarette smoke?
Here in the Basel, Switzerland area there are mask mandates when shopping or taking public transit. Yet every day when I walk to or from the train station, I see dozens of people smoking outside the ...
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Would a vaccine made for humans work on animals who can get the same virus?
Recently it has been reported some dogs and cats getting covid-19. This doesnt seem to be so common I suppose, since we only hear about a few cases but I'm assuming they can transmit the virus anyway. ...
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What happens to a disposable FFP2/N95 respirator during the prolonged use?
Background
The area I live in has a regulation that people should wear PPE when visiting grocery stores, etc. There is a shortage of PPE. I have access to some non-reusable FFP2-class respirators that ...
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Accuracy of COVID-19 Diagnostic Testing, particularly false-negatives [closed]
I was surprised to hear Sanjay Gupta (CNN) say this morning (4/28/20) that there is significant disparity in the accuracy of the COVID-19 Diagnostic testing. He specifically mentioned that the ...
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Have cases of Covid-19 virus "reactivation" been noticed in countries besides China and South Korea?
April 10 news:
South Korean officials on Friday reported 91 patients thought cleared of the new coronavirus had tested positive again. [...]
Jeong Eun-kyeong, director of the Korea Centers for ...
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What clinical presentations are you seeing in Covid-19?
Many of us have yet to see a case. What is your personal experience?
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The estimated number of COVID-19 infected cases vs the actual number of cases in China stabilizing
The number of cases in China is reportedly stabilizing due to drastic measures taken by its government as the following figure (from [1]) shows. On the other hand, based on the value of R0, Marc ...
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Is Omicron now confirmed less lethal than influenza?
Back in March, a study made in Japan comparing Omicron with influenza, when most of the Japanese population (about 90%) had only 2 vaccine doses, and no previous infection with Omicron, claimed ...
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How Long Must a Window Remain Open to Decrease the Risk of COVID?
Suppose there is an emergency and 10 fire fighters enter an apartment. None are wearing masks. Many public health authorities recommend opening windows to decrease the risk of COVID-19 infection.
For ...
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Are "some serious side effects and deaths expected" from a mass vaccination campaign of a new vaccine?
According to
What is known so far about the post vaccination deaths in Norway
Medical director Steinar Madsen stated,
Q: Were these problems unexpected?
A: No. A mass vaccination campaign by ...
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How it is even possible to compare those groups?
In this publication
36 patients, 16 in control group (31,25% were kids (!!!!) 10-16 y.o., 25% asymptomatic, 62,5% URTI and 12,5% LRTI), 14 in HCQ (14,3% were asymptomatic, 71,4% with URTI and 14,3% ...
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Are there known outdoor super spreader events for COVID-19? Are there *any* known outdoor infections at all?
The title says it all: Are there known outdoor events or gatherings where the virus was spread to a large number of persons?
We know of many indoor super spreader events (choirs, bars, private parties ...
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Do coronavirus antibodies give you any immunity?
According to Coronavirus antibodies may not make you immune, WHO warns
There is no evidence to suggest that recovered coronavirus patients and former asymptomatic carriers who have coronavirus ...
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Antigen vs PCR test
In the Czech Republic there is now mandatory testing for factory employees.
Anecdotally I am now being told by people I am acquainted with, who run medium sized firms here, that their employees are ...
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Why shall I wash my mask but not my clothes? [closed]
Due to the Covid-19 pandemic, we citizens are asked to wear masks in Germany. Early reports said that wearing a mask may not help to protect myself from other infected people, but it protects others ...
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Is South Korea doing "random" testing to combat covid-19 epidemic?
It is well-known that South-Korea has developed a powerful system of drive-through testing allowing them to test hundreds of thousands of person in the past two months. I was wondering whether the ...
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Contraction-to-contagion duration for covid-19?
I've read that the incubation period of the covid-19 virus ranges from 2 to 14 days with rare exceptions (e.g. here). However, a person carrying a virus could theoretically be contagious and transmit ...
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What is the difference between different mask standards?
I am looking at buying a new batch of masks, since I still prefer to use a mask for my travelling. I am close to running out again, and the company that I previously got masks from now has a 'new' ...
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Details on "Health Impact Events" on V-safe Active Surveillance for COVID-19 Vaccines
Some dubious websites (which I won't link) are claiming that COVID-19 vaccine caused disabilities in more than 3.000 people. As a support of this claim, they cite the table "V-safe Active ...
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In the Moderna phase 3 clinical trial of the vaccine for COVID-19 what is in the placebo?
Moderna has started a phase 3 clinical trial to evaluate if their vaccine can prevent coronavirus disease 2019.
What specifically is in the placebo?
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Why has covid-19 death rate reduce over the months?
I have been following the COVID-19 news for quite some time now and there is this one thing which is just bugging my head. When I first started seeing the statistics, the death rate was at around 15% ...
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Has World Health Organization provided nutrition/diet/exercise guidelines to strengthen the human immune system for better responding to COVID-19?
Medical sciences is not my subject but my personal feeling is that:
A strengthen immune system can better respond to viruses than a weak immune system.
A balanced diet in combination with exercise ...
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Are hand-made mask using HEPA safe to breath through?
As we know, there are no N95, N99 nor N100 masks anymore.
In this YouTube video A Doctor Explains How to Make the Safest Face Mask, a doctor, and then his wife, talk about 'the safest face mask' hand-...
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What's the longest known case of covid-19 infection?
Recently it's been reported about a spanish politician who has been infected with covid-19 for over 5 weeks. Is this possible or does it have to be a re-infection? What's the longest known case of ...
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Degree of correlation between viral load and symptom severity in Covid-19?
Someone asked here a general/related (qualitative) question Does viral load of the initial infection affect its severity? but I'm interstested a more focused question regarding Covid-19:
How well ...
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Likelihood of death from coronavirus after being admitted
Ive looked extensively but in amongst all the stats available, I cant find the proportion of people who are admitted to hospital with coronavirus but then go on to recover - any help much appreciated!
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If I get COVID-19, can I still drink coffee? [closed]
In this link
Mentions
Take these steps to monitor your health while you stay home and practice social distancing:
Stay home, except to get medical care. Get rest and drink plenty of fluids.
...
Get ...
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If models predict that COVID-19 cases leveling off by July, what is the point of developing a vaccine, if we all have the immunities by then?
A model from the University of Washington predicts that new COVID-19 cases and deaths will drop to zero shortly after July 1:
https://covid19.healthdata.org/projections
I assume that's because the ...
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Is it possible to get Covid-19 and have 0 symptoms along the complete journey and hence cure by yourself without knowing?
In this link, in the section How long is it between when a person is exposed to the virus and when they start showing symptoms? mentions
Recently published research found that on average, the time ...
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Coronavirus active in freezer for years
For what I read [1], Covid19 can persist active in a common freezer for months or years (it seems pretty obvious: cold, humid...). My question does not regard only the currently active coronavirus at ...
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Is there a way to test for covid 19 after recovery?
I had symptoms that could have been corona symptoms last week. Unfortunately the testing capacity in my country (Germany) is not sufficient to test every person with symptoms at the moment, so only ...
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How accurate is this covid-19 article related to reinfection risk after recovering from omicron?
Sorry if this is wordy. I've tried to include the research I did, before asking. If anything is poorly worded, let me know, I'll try to fix it.
This article, although sketchy, and slightly ...
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Does quarantine after testing positive for covid19 make the virus more dangerous?
This might be a stupid question, but I feel unable to assess that, so I've decided to ask anyway.
My assumptions:
RNA Viruses mutate always, all the time.
Mutations with milder symptoms are likely to ...
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Antibodies and Immune system
I was just educated by my physician about some details of the differences between the qualitative and the semi-quantitative COVID-19 antibody tests. I understand now that the result of the semi-...
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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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Are side effects of corona virus vaccines no worse than virus symptoms?
In my country there is a general fear for side effects of the Pfizer and Astrazeneca vaccines, also due to some deaths among people having taken the vaccine.
I reason that since the vaccines replicate ...
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Why wouldn't the Pfizer, Moderna, AstraZeneca, and Johnson & Johnson vaccines be equally effective?
Based on what I have read, the Pfizer, Moderna, AstraZeneca, and Johnson & Johnson COVID-19 vaccines all work by training the immune system to recognize the spike protein on the surface of the ...
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Why Covid 19 death record shows ridge and trough?
Here's something I find interesting about Covid 19 death record: The up and down cycle must repeat itself once the horizontal timescale is sufficiently short, regardless of whether the general trend ...
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What are some medical conditions and disabilities that might prevent someone from wearing a face covering during the COVID-19 outbreak?
In Oregon, my local news station said that many local businesses, such as airports, are requiring that everyone wear masks or face coverings to slow the spread of COVID-19. They said that those who ...
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Is there research on the relative effectiveness of different social distancing measures?
Toward the end of the widely read Medium article The Hammer and the Dance, the author talks about "the ROI [return on investment] of social distancing". He provides a chart and a table showing the ...
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