Questions tagged [covid-19]

Describes the clinical disease caused by the SARS-CoV-2 virus

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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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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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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?

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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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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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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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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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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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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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 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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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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Has there been any medical studies as to whether drinking a 'Hot Toddy' can help to ward off or to help heal someone who has COVID-19? [closed]

I am curious to know if there has been any medical studies that have been conducted to ascertain if drinking a 'Hot Toddy' every day will decrease the odds of someone being infected by the COVID-19 ...
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What do we know about Long Covid and Omicron?

Longer term covid symptoms/sequalia ("Long covid") tentatively seem to be attributed to the virus playing havoc with bodily organs, the bloodstream, perhaps the immune system, and so on. Its ...
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Help interpreting PCR lab results [closed]

Started isolating after my brother, who I live with tested positive, and four days later I was also testing positive (making it likely he transmitted it to me). I did a PCR test and the lab returned ...
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Is the WHO guideline on registering covid-19 deaths very expansive?

In this WHO guidelines document: Guidelines for certification classification of covid-19 as cause of death, it says: 2. DEFINITION FOR DEATHS DUE TO COVID-19 A death due to COVID-19 is defined for ...
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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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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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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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Susceptibility of β-Thalassemia Heterozygotes to COVID-19

A recent study by medical researchers in Greece (https://pubmed.ncbi.nlm.nih.gov/34441941/) concluded that β-Thalassemia Heterozygotes (carriers) are more susceptible to severe symptoms of COVID-19 as ...
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Are covid vaccinations and boosters still useful and if not, why are governments and agencies promoting them?

So regarding Omicron, the latest research shows that vaccines and convalescent immunity have no or negligible effect on Omicron, and that booster shots have very little neutralising activity. On the ...
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Any merit to the notion of limiting COVID19 vaccine only to those aged 60+ or with a comorbidity

Last night I heard Peter Navarro, Trade Czar under the Trump administration, being interviewed on TV. He was plugging his new book. During the course of the sloppy interview, in which he and the ...
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Is the risk of cardiac arrest still superior, for unvaccinated people contracting Omicron, than for people receiving RNA vaccines?

According to this article, Vaccines linked to small heart inflammation Among those who had received the Pfizer vaccine, the researchers noted, the rate of myocarditis or myopericarditis was 1.4 cases ...
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How long it will take for a RT-PCR test CT value to go to from 27 to 35?

A RT-PCR test came positive and the CT value is 27, which means apparently a low contagion level. But is there a way to estimate when (in average) it could go til 35 (the cutoff)? The graph from here ...
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How does eating or drinking affect lateral flow tests using nasal swab only?

With Covid testing in England (not sure about Wales, Scotland and Northern Ireland) the free lateral flow kits have been in 2 forms. The first DHSC kits DHSC (Department of Health and Social Care) ...
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Spreading covid talking vs breathing risks

Some links claim one can spread covid merely by breathing (not talking): Currently available research supports the possibility that SARS-CoV-2 could be spread via bioaerosols generated directly by ...
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How soon after the second Sinopharm jab can you safely get a Pfizer booster jab?

Imagine someone was in a hurry to get high immunity (the Sinopharm jabs are said to be at best only moderately effective) , or there was a free Pfizer booster jab available for a limited time. What is ...
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After exposure to covid when is someone contagious?

Here it says: The time from exposure to symptom onset (known as the incubation period) is thought to be two to 14 days, though symptoms typically appear within four or five days after exposure. We ...
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The number of active cases of COVID

I have been looking at this URL for information about Covid: Graph of number of active cases of Covid In particular, I am looking at the graph of the number of active cases. I would expect/hope that ...
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Cardiovascular complications associated with COVID 19 by vaccination status and, if vaccinated, by type

I apologize if this is an obvious question. I think I am not finding research on this because I am asking the question wrong in literature searches. I am far outside my normal area of academic ...
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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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Does covid significantly increase the chances of losing a baby? [closed]

As two late 20s early 30s healthy adults, both vaccinated with two dosages of Moderna more than 6 months ago, we suspect a pregnancy (wanted!). We've heard that being ill with Covid-19 increases the ...
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The number of new cases of COVID

I have noticed that the number of new Covid cases in the United States is running roughly 100,000 per day and increasing. What percentage of those new cases are people that are fully vaccinated? In an ...
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How reliable are Covid-19 antigen quick tests for vaccinated, asymptomatic infected?

A few weeks back, virologist Dr. Drosten tweeted "Before onset of symptoms, quick tests are not sensitive enough [...] Sensitivity appears lower in vaccinated (preliminary data) [...]" (...
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Which is the best COVID-19 booster dose for a patient in their forties?

The Iranian government now recommends booster doses for those 40 years old or older. Most people in Iran were vaccinated with Sinopharm. For a booster, they can choose between Sinopharm, Astrazenk, ...
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Covid-19 - Spain - A completely unvaccinated person, wants the covid-certificate, logic of requiring all 3 jabs, instead of just latest 1 or 2 jabs?

Covid-19 - Spain - A completely unvaccinated person, wants to get the covid-certificate / covid-passport, what's the logic of requiring all 3 jabs, instead of just the latest 1 or 2 jabs ? Is the ...
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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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Where is the data for Covid-19 vaccine safety in medium term and/or for people with chronic health conditions?

I have several middle-aged relatives which are... let's say postponing their vaccination due to fears of their safety. Now, I know there are some people who will never be convinced by anything, ...
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What is a person called before he is a patient

I am working on COVID related app. There is a scenario when I need to collect details of person who wants to have COVID tests. I want to show a label on the app whose meaning is: Details of a person ...
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For how long does the legal requirement to report deaths after COVID-19 vaccination to VAERS last?

The US Health and Human Services VAERS FAQ for COVID-19 says (emphasis in original): What adverse events should healthcare providers report to VAERS after COVID-19 vaccination? [...] Healthcare ...
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Is there any identified policy Japan is doing to successfully reduce COVID-19 the other countries aren't using?

By the end of October 2021, while many europeans countries are having 10,000 to 40,000 cases per day, Japan with a much larger population is having less than 100 cases covid cases per day. When you ...
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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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CDC - Severity of Disease Among Adults Hospitalized - Covid

The cdc published Severity of Disease Among Adults Hospitalized with Laboratory-Confirmed COVID-19 Before and During the Period of SARS-CoV-2 B.1.617.2 (Delta) Predominance — COVID-NET, 14 States, ...
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How much less effective are the antibodies produced against the Alpha-SARS-CoV-2 spike protein against the Delta-SARS-CoV-2 spike protein? [closed]

When viruses mutate and the surface of a protein changes that usually results in the antibodies that the body produced against an earlier form of the virus working less well. By what factor do ...
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Re - Covid-19 - Mandatory vaccination - What's the logic behind not checking for antibodies in individuals before requiring their vaccination? [closed]

The Question Re - Covid-19 - Mandatory vaccination - In countries with mandatory vaccination, what is the logic behind not checking for antibodies in individuals, before requiring the vaccination of ...
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Will the COVID-19 virus ever stop mutating into new variants? [closed]

I am curious to know if it has been discussed within the medical community as to whether the COVID-19 virus will ever stop mutating into new variants, and if it has been discussed, what is the ...
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