Questions tagged [covid-19]
Describes the clinical disease caused by the SARS-CoV-2 virus
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Does a shorter COVID-19 vaccination interval increase efficacy of booster vaccines?
In performing research on COVID-19 vaccines, I came across this WebMD article regarding the efficacy of bivalent boosters against recent COVID-19 variants.
The article includes a quote from Dr. Hana ...
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How bad are covid vaccines? [closed]
For the past year I've been hearing about people claiming that those who took the covid jabs are dropping like flies. I even hear people claim that the covid vaccinations are depopulation tools and ...
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Comparitive exposure to spike protein between mRNA vaccines and an actual Covid infection
Do we have any data or estimation regarding the relative spike protein exposure between an mRNA vaccine and an actual Covid infection?
This is a complicated question.
Assume two identical humans are ...
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I have my Covid-19 vaccine batch number. How can I know about its side effects?
There should be a public database where are listed the side effects of all batches of all Covid-19 vaccines injected so far.
I have the batch number of my jabs.
Does anyone know how/where to access ...
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What sort of filter material self sterilizes?
I am working on a self-inspired project to design a cheap mask for my community.
So far the problem with the common masks is that they just stop a percentage of materials (droplets) to get in but it ...
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Is Covid-19 still a problem/should it be considered one? [closed]
I'm hearing different things from different people (as is always the case), about the current status of Covid-19.
Is the pandemic (endemic?) still an issue that's worse than influenza or other common ...
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Blood count and adenovirus vaccines
Some covid-19 adenovirus vaccines including AstraZenca and Johnson & Johnson are found to have potential link to a rare albeit serious side effect resulting in blood clots with low platelets, ...
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Useful indices in epidemiology for assesing the performance of a country in Covid19 pandemic
In my dataset I have daily observations of Covid19 data for many countries. More specifically, I have daily observations about:
new_cases (New confirmed cases of COVID-19. Counts can include probable ...
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Was the Huanan wet market a super spreader event instead of ground zero for COVID-19?
There have been a number of well recognised super spreader events such as Patient 31 in South Korea where a member of the church called Shincheonji was thought to have spread the disease to 30-40 ...
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Does prior COVID infection increase or decrease mortality on COVID reinfection?
One recent large scale study found that a prior COVID infection doubles your risk of dying when you later catch a subsequent COVID infection.
This study followed 5 million people in the Veterans ...
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How would you properly interpret this graph? [closed]
I recently came across this article and I am having a hard time trying to properly interpret this graph. The graph is pictured below. Below that is the actual link to the article. I appreciate any ...
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Are there any covid-19 vaccine side effects that can't be gained from a covid infection?
Some side effects from a covid vaccine are caused by the patient's immune system's response to the vaccine - for example myocarditis (source 1, source 2) - which will therefore also occur from a covid ...
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Why aren't we sterilizing N95 masks?
Please forgive the obvious question.
H2O2 vapor sterilization is deadly for the layperson but should be workable for hospitals. I can't find the small Chinese study I read the other day about it. ...
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Important thresholds in the number of postive cases of COVID-19 per capita
What are some important quantitative thresholds on the charts tracking the number of positive cases of COVID-19?
I've been monitoring the number of positive cases of COVID-19 for a couple years now, ...
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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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Which countries advocated for "support bubbles" or "pods" during the COVID-19 pandemic?
Which countries specifically included the concept of "bubbles" or "pods" in their communication and education campaigns to their populations during the COVID-19 pandemic?
I ...
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Why is the flu more deadly to children than COVID-19?
Or better framed: Why are children not developing as severe reactions from COVID when they tend to fare much worse from seasonal flu?
Is the answer something along the lines of: Those that don't die ...
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Can a RT-PCR test claim 100% sensitivity and specificity?
A recent RT-PCR test for SARS-CoV-2 from a private laboratory lists the test's sensitivity and specificity as 100%. The test certificate lists this next to the result:
Ref. value/Норма
Negative (...
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Does this Covid-19 vaccine study suggests a 1 to 718 rate of adverse effects?
As I have not much skill in reading medical research, I wanted to verify my calculation of this research result.
A big peer-reviewed research paper entitled Safety of the BNT162b2 mRNA Covid-19 ...
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Have any regulatory agencies announced they would allow live Covid-19 human challenges (for vaccine testing purposes)?
It's been mentioned to me in the discussion on another question that the following proposal has been advanced (in a medical journal):
Controlled human challenge trials of SARS-CoV-2 vaccine ...
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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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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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Covid 19 rapid test possible errors from waiting too long to read?
What are the error modes of waiting too long to read a rapid antigen test? Does this increase the probability of the user reading a false positive, false negative, or both? How does this depend on ...
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Negative COVID test day of event, positive next morning. What is the risk of transmission?
Imagine someone attends a relatively large social gathering during the day and evening. That morning they had a negative COVID test. There was substantial close contact, such as hugging.
The next day, ...
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False positives of PCR test on symptomatic individuals
On this website, I see that less than 2% of people who don’t have Covid-19 test positive with a PCR test.
What happens to this percentage when we only consider symptomatic people?
So my question is: ...
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Administration of Covid Vaccine for Small Children in the EU
Is there a way to see the progress of the administration of Covid vaccines for small children (age under five) in the EU?
It is not easy to find all information in the usual news sources.
Maybe there ...
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Why does the World Health Organization still treat COVID-19 as a pandemic, when it is now reportedly causing fewer deaths than influenza?
Supposedly the World Health Organization is the top authority worldwide for public health. One would hope that they base their decisions on empirical data and not beliefs. However, from my perspective,...
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Rapid Response COVID-19 Antigen Test: What can be assumed by the control bar?
Rapid COVID-19 antigen tests include a control line similar to this:
From Case Western Reserve rapid testing instruction available here.
What does the control bar/strip control for?
All the ...
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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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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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Is there any evidence that honey can help a COVID cough? [duplicate]
A cough is a frequent clinical sign of COVID-19, and there is some indication that coughing can cause lung "sprain" and long lasting damage.
The UK National Health service has a page on Self-...
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Would slight shifting of administration times of Paxlovid impact its efficacy?
Paxlovid (nirmatrelvir/ritonavir) is an oral medication indicated for patients recently diagnosed with COVID-19 and who are at high risk of deterioration. This drug received an emergency use ...
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If COVID-19 isn't spread through even food, why is it recommended to disinfect common objects?
Currently, researchers say that there is no evidence of COVID-19 spreading through food:
"The risk of getting COVID-19 from food you cook yourself or from handling and consuming food from ...
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Why should males use contraception for longer after taking molnupiravir for COVID?
Molnupiravir (brand name Lagevrio) is a small-molecule antiviral prodrug active against SARS-Cov-2 and in one trial was found to reduce risk of hospitalization or death from COVID by 52% (Jayk Bernal ...
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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 are some vaccines 100% effective while others aren’t? [closed]
Why are some vaccines, like for rabies, 100% effective at treating someone while others, like the covid 19 vaccine, isn’t.
Disclaimer: not a dumb vaccine skeptic or anything just genuinely curious.
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Are there any downsides in getting vaccinated with the Pfizer or Moderna COVID vaccine after having received the Johnson & Johnson's COVID-19 vaccine?
I read on
https://www.usnews.com/news/health-news/articles/2021-07-01/reports-of-some-getting-pfizer-moderna-boosters-after-j-j-vaccine-prompts-calls-for-more-guidance (mirror):
With the delta ...
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Covid may cause brain to degenerate three times faster than normal?
I found this study on GB News: Covid may cause brain to degenerate three times faster than normal, Oxford study suggests
After reading the article I still have a few questions. I found the study ...
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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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Are there any randomized clinical trials being conducted on TMPRSS2 inhibitors for Covid-19 treatment?
In a recent paper on why hydroxychloroquine doesn't really work against Covid-19, it's been demonstrated that SARS-CoV-2 is much better at taking advantage of TMPRSS2 at the cell membrane surface, so ...
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Does this infographic show that masks increased the transmission of COVID-19 in Los Angeles County?
As the title says, my father alleges that this graph shows that masks have increased COVID-19 rates. Does the graph prove this relationship, or is this just a faulty correlation?
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How long after COVID-like symptoms start can one still find out if what they had was COVID?
Suppose someone has COVID-like symptoms. Let's pick an arbitrary date; say they wake up coughing on February 1st, 2022, with no prior symptoms, and unknown potential exposure date.
If this person is ...
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Is there any general consensus in the research on what the maximum duration is that the mRNA vaccine spike remains in the body?
Is there any general consensus in the research on what the maximum duration is that the mRNA vaccine spike remains in the body?
I thought I read some time ago from CDC but could be mistaken that at ...
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Effectiveness of COVID-19 "booster" (typically the third shot) when being administered after a long time following the initial two doses
In layman's terms, "booster" seems to mean to enhance upon the initial vaccination dose(s). This article suggests administering it after about six months.
I am considering having the third ...
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Is booster dose needed for chinese vaccines
I can't seem to easily find such information and would greatly appreciate some help. Does anyone have information if booster (third) dose is required or recommended for Chinese Covid vaccine sinopharm?...
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Ivermectin Paper with Hard To Believe Conclusion, Can I Get Some Help? [closed]
Is this a robust study and are the conclusions supported by the data?
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8417612/
Emphasis is mine.
Two doses (300 μg/kg/dose in a gap of 72 hours) of ...
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Do any studies on 'Long COVID' compare to a control group?
This study, which is citied in a Harvard Health article on Long COVID, shows that ~55% of people suffered fatigue 6 weeks after having COVID-19:
But it doesn't compare against the prevalence of '...
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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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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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Did covid vaccine studies use an active placebo (with side effects)?
I know that the studies done by Pfizer, et al, used standard methods with a placebo control group. If you read about blinded experiments here, it mentions:
A common cause for unblinding is the ...
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