Questions tagged [covid-19]

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

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2answers
703 views

Is there any identified policy Australia is doing to successfully control the covid-19 pandemic and have no deaths, other countries aren't using?

According to, Australia COVID Australia had 3 deaths for covid-19 in the last 8 months, and they succesfully controlled the pandemic at least 9 months ago, 3 months before starting vaccinations. ...
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Covid-19 incubation period for vaccinated people

1The incubation period for covid-19 can be even something like 14 days. I guess this can be caused by having no specific immunity to this disease, so it takes some time for the immune system to react. ...
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Where can I find up-to-date information on the vaccine efficacy for different COVID-19 variants and the main COVID-19 vaccines?

I wonder if there exists some up-to-date information on the vaccine efficacy for different COVID-19 variants and the main COVID-19 vaccines (e.g., similar to COVID-19 cases trackers or COVID-19 ...
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Do mutations occur while growing virus for preparing inactivated viral vaccine?

The development of mutations in virus is reported to happen during replication, especially for an mRNA type virus like SARS-COV-2 Viruses that encode their genome in RNA, such as SARS-CoV-2, HIV and ...
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Drink one bottle of beer after Sinopharm shot: Can it cancel the protection?

I wasn't warned and I drank one bottle of beer on one day, and half bottle of beer on another day after taking Sinopharm second dose. Can it affect how will the vaccine protect me? There is some rough ...
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1answer
35 views

Scheduling second Pfizer vaccine

I've had my first Pfizer vaccine and the second is scheduled 11 weeks after the first one. I may have to postpone it though. If I cancel it, what is the latest date I can take the second dose without ...
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1answer
40 views

What are the possible effects of getting the second dose of a coronavirus vaccine out of the expected time?

In my country it has been decided to postpone the second dose of the Sputnik V vaccine, "to vaccinate more people". They've decided this based on no study but solely in the belief of the ...
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1answer
51 views

How effective is sinovac/sinopharm vaccine

it's time for me to get vaccinated with sinovac vaccine. I am actually a little bit nervous, about its effectiveness, I am not a docotor and I have no idea what's behind it. I am worrying that it ...
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How does knowing how COVID-19 originated help prevent future pandemics?

There's been an ongoing effort to investigate the origins of COVID-19. The motivation is allegedly to prevent another pandemic from happening. How does knowing how COVID-19 originated prevent another ...
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Is there a good recent review on the treatment options for COVID19?

I am looking for a summary/review of all the treatment options that have been studied for COVID19? The British medical journal is updating a tremendously helpful ressource (https://doi.org/10.1136/bmj....
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1answer
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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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What is the difference in survival rate in all old people vs all healthy old people once infected with covid?

What is the difference in survival rates of people infected with covid who are members of the group defined as all people 70 years of age and older (say) compared with the group of all people of that ...
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How much more likely to die of covid, once infected, are you if you have no access to medical treatment?

How much more likely to die of covid, given that you are already infected with it, are you when you have no access to medical treatment compared to when you have access to full medical treatment ...
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Do covid vaccines increase the risk of antibody-dependent enhancement?

A QAnon video which takes Nobel Prize winner Luc Montagnier's suspect claims about covid vaccination and multiplies them beyond recognition states that mass vaccination will lead to mass ADE, and that ...
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What is meant by “vaccine efficacy?” [duplicate]

As a lot of people are aware, vaccines produced by different pharmaceutical companies have different “efficacy rates”:For example, this chart from the BBC which shows different rates of how effective ...
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Fluid in lungs from pressure during bowel movement? [closed]

One of my relatives is admitted in the hospital because he got infected with COVID. And yesterday, his lungs had fluid in them because he exerted pressure during defecation. How is this possible? ...
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Why are corticosteroids used to treat Covid-19 [duplicate]

I read an article on the BBC which said that corticosteroids where used to treat Covid-19 patients in India. Later they changed the word corticosteroids into steroids and they added that they were ...
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1answer
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Are the covid-19 vaccines more protective against severe disease and death than against simple infection?

I have frequently heard variations of the following claim: "The vaccination reduces your chances of getting covid, and even if you do get it, it is much less likely to be severe." I can't ...
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What cells and how many of those are infected and destroyed as a result of COVID-19 vaccine?

My understanding is that cells modified by COVID-19 vaccines will eventually get killed by immune system. Do we know what cells are usually targeted by vaccines and how many of those get killed as a ...
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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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1answer
117 views

Do vaccinated people not have zero risk of mortality by Covid 19?

This video by Vox says people who are vaccinated have zero risk of mortality by Covid 19. But NDTV reports (at 00:21 and again at 07:53 in the video) that even fully vaccinated 8 frontline medical ...
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1answer
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Is SM-102 a safe ingredient in the Moderna vaccine, despite these safety warnings?

I recently saw a post online which called into question the safety of the Moderna vaccine through an interesting argument. One of the ingredients in the Moderna COVID-19 vaccine is the ionizable amino ...
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1answer
244 views

What exactly is the difference between Sputnik V lite and Astrazeneca vaccine?

As far as I know, both Astrazeneca and Sputnik V lite are Vector vaccines using an Adeno virus as a vehicle for the DNA of the spike protein of Covid-19. But Astrazeneca requires two vaccine shots ...
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Why do some vaccines cause flu-like symptoms? Why does this seem to be more severe in mRNA vaccines?

Flu like symptoms are noted as possible reactions on nearly every vaccine I've had since adolescence, but I've never actually seen these symptoms in myself or anyone, until now? I don't doubt that ...
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1answer
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Antibody test after vaccination with BBIBP-CorV

After vaccination with BBIBP-CorV (inactivated) which of the following tests can be taken to determine if the vaccine produced an immune response: IgM for N protein IgG for N protein IgG for S ...
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what causes hypoxia in Covid19?

What is known right now about the causes of hypoxia in Covid19 infection ? Does it comes from thrombosis formation in lung vessels ? And/or because of damage of lung alveoli by viral replication ? Or ...
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1answer
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Were thrombocyte counts or bleeding events monitored at all during ChAdOx1 (AZD1222) clinical trials?

Maybe I'm just missing something, but on a quick look, I find it a bit strange that since issues with thrombocyte (platelet) counts in adenovirus-vectored therapeutics have (1) been known for about ...
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Vaccine production by company

As of May 8, 2021 which companies have the highest rate of covid vaccine production? I would be satisfied to see a list of 10, but a list of 5 or 3 would be good as well. Also any unit is fine number/...
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Is the decrease in vaccine uptake in the US for two weeks in a row in line with some models' expectation?

According to Reuters news of May 3, vaccinations have also fallen in the US for two weeks in a row. Nationally, deaths from COVID-19 fell 3% to 4,819 in the week ended May 2, the fewest deaths in a ...
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Would it be okay to have the Astrazeneca vaccine if I had dengue hemorrhagic fever as a child? [closed]

Although it happened more than two decades ago, I still remember being very ill, vomiting so much blood at one point. I was given an IV drip and had to stay in hospital for a while. Would having had ...
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What is the historical or scientific basis for concern about COVID vaccines and pregnant women and their babies?

There's a lot of talk about whether COVID vaccines are safe for pregnant women and their fetuses. Current guidelines, while mentioning that there's little data, suggest that they are safe. However, I'...
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When speaking of vaccine efficacy (for COVID-19, or other), is immune response or efficacy really being measured? [duplicate]

I've been performing many web searches using combinations of the words "vaccine", "vaccination", "COVID-19", "coronavirus", "efficacy", and "...
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Covid-19 and Original Antigenic Sin

My understanding of original antigenic sin, which I admit is minimal, is that with some pathogens, your immune system gets too focused on one variant and thus is wholly unprepared to deal with a ...
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Will there be any error in the result if the sample taken for COVID-19 RT PCR test is kept for days before performing the test?

What would be the impact of keeping the sample (nose swab) for 5 days before performing RT-PCR on it? If no, then is there a particular way of storing the sample. Is there any standard set by the ...
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Has the initially reported rate of anaphylaxis following the Pfizer Covid-19 vaccine been sustained in later data?

A CDC/MMWR study that made the news back in January found that: The CDC said there were 21 cases of anaphylaxis — a severe and life-threatening allergic reaction that occurs rarely after vaccination —...
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How does the Control Zone on Rapid Covid Tests work?

How does the Control Zone on Rapid Covid Tests work? The Test Zone reacts to covid cells, from what I understand. But to what reacts to Control Zone?
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Is there any data on herbal supplements interfering with the efficacy of vaccination?

Here's an excerpt from a paper published in "Journal of Inflammation Research" by Dove Press for a popular and controversial herbal supplement from India: Coronil effectively inhibited the ...
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1answer
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what does 95% effectivenes mean for vaccines (covid) [duplicate]

Often we see in news they say AstraZeneca is 95% effective, while Chinese vaccine is 50%. I have question how to interpret these numbers. Does this mean that if you get vaccinated with AstraZeneca ...
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0answers
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What are the “theoretical risks” of COVID vaccines in mothers

In Germany, there is no official endorsement of COVID mRNA vaccines for pregnant women and nursing mothers due to a lack of study data. Still, professional societies generally recommend considering ...
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Can Weightlessness help cleaning lungs from Microorganism in Covid-19 patients? [closed]

We know that cleaning lungs from Microorganisms in Covid-19 patients is hard. But In Weightlessness materials easily move around. So could Artificial Weightlessness help doctors for safer and more ...
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1answer
63 views

Why have so few people received a second dose of the vaccine COVID-19 in India?

From https://www.google.com/search?q=india+covid+cases&oq=india+covid+cases: Why have so few people received a second dose of the vaccine COVID-19 in India? I've searched for "india second ...
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How does the thrombosis risk of COVID compare to that of the vaccines?

There was some news, possibly based on this paper, that the risk of thrombosis caused by COVID-19 is supposedly 10 times higher than that of "vaccination". To me this conclusion seems flawed ...
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Why do the COVID vaccines not cause the body's immune system to over-react?

It was my understanding that the reason why some people suffered serious effects from a COVID19 infection is that their immune system over-reacted to the disease, causing havoc all over. Why doesn't ...
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1answer
96 views

Which covid-19 vaccines have suspected cases of thrombosis?

As far as I know, Astrazeneca, Moderna, Pfizer and Johnson & Johnson have suspected cases of thrombosis. U.S. Recommends Pausing Use Of Johnson & Johnson Vaccine Over Blood Clot Concerns ...
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Is there any study on the efficacy against hospitalizations of the first dose of the Sputnik V vaccine?

For the Sputnik V vaccine there has been a study about the efficacy of the vaccine 2 doses which states it has 91.6% efficacy against infection and a 100% efficacy against hospitalization. Sputnik V ...
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2answers
1k views

COVID-19 mutation nomenclature

Consider: Source: Where Do COVID Vaccines Stand Against the Variants? The nomenclature seems to follow a hierarchical pattern. What does the first letter and the subsequent numbers indicate? Location ...
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1answer
71 views

Did those who lose smell due to covid regain it after all?

We know people for example can lose taste or smell due to covid, some have this even for months, but is there data if people eventually do get this senses back or not?
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Are coronavirus-like spikes only seen in viruses?

Are there any natural proteins or cells (or anything) made by the human body with spikes like those of Covid-19? I know that there have been no serious side effects reported from the Covid-19 vaccine, ...
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How is the decision for recommending a vaccine reached

There is an ongoing discussion about the use of the AstraZeneca covid-19 vaccine (Vaxzevria) in Europe. Some countries like Germany restrict the use of this vaccine, some - like Austria - do not. How ...
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How accurate is the individual number covid-19 variant cases in each state?

How accurate is the individual number of covid-19 variant cases in each state? US COVID-19 Cases Caused by Variants I am trying to estimate the risk of being exposed to the one B.1.351 variant where ...

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