Questions tagged [covid-19]

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

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Bottleneck(s) to vaccinating the world against Covid-19?

Given that Covid-19 has shown its ability to rapidly mutate within host population which remains largely unvaccinated, what are the main reasons we have not fully vaccinated ourselves? I’m not looking ...
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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?

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?

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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If you had side effects to a covid-19 vaccine, should you get a different one for your booster shot? [closed]

I had the Johnson and Johnson covid-19 vaccine in March. Upon getting it, I had flu-like side effects for a couple of days. Now it is time to get a booster shot. My question is, if I get JJ again will ...
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Does China risk never being able to open their borders? [closed]

This question may seem odd, so first a little background: I'm a European living in China, speak fluent mandarin Chinese. China has been following a no-tolerance zero-covid strategy since the beginning ...
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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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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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What percent of deaths caused by influenza list no other comorbidities on the death certificate?

You may remember the bit of covid misinformation that circulated awhile ago saying that only 6% of the official covid death numbers were actually due to covid https://www.factcheck.org/2020/09/cdc-did-...
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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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Moderna vs Pfizer booster

What published studies exist to support the choice of Moderna or Pfizer booster? The only study I could very quickly find is below. The study seems a bit preliminary, exactly as it says on the tin. I ...
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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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Do flu shots make sense during the COVID-19 pandemic?

My understanding is that the flu shot is a good idea based on a cost benefit analysis. People are likely to get the flu and get sick and the flu shot helps with this. On the other hand, the flu shot ...
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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 results. A big peer-reviewed research titled Safety of the BNT162b2 mRNA Covid-19 Vaccine in a ...
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Are Covid-19 vaccines much more deadly than people (and scientists) think?

The other day I read this chart on an Italian newspaper article I looked for the source, and I found only this tweet: https://twitter.com/Drs4CovidEthics/status/1432193260949172230 from Doctors for ...
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Why did J&J go for one dose?

The latest news from the US is that the CDC & FDA recommend a booster shot after only two months following the "single dose" J&J vaccine. Given the Fauci comment that J&J "...
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Did the NIH study find Moderna - Moderna gave more antibodies than Moderna-Pfizer?

An NIH study studied the efficacy of different combinations of Covid-19 vaccines in terms of the level of antibodies produced. Dr. Rob Swanda tweeted out a chart summarizing the results: So it seems ...
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Vaccine death efficacy calculation and how it works

I am no medical expert, am just curious how vaccines work in general, especially in preventing severe illness and deaths. I have read articles, seen videos on youtube, and seen how efficacy is ...
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COVID-19 exposure risk from passing joggers versus walkers

What is the COVID exposure risk from passing close by someone who is jogging relative to passing close by someone who is walking? The reason I ask is with regard to going out for exercise, or to run ...
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How do the viral loads of vaccinated and unvaccinated asymptomatic, and symptomatic individuals differ for COVID-19?

I'm searching for information regarding the above question, but I seem to keep finding conflicting information. Some articles say that asymptomatic people have higher viral loads than symptomatic ...
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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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What are the concrete odds of myocarditis in using Modena vs Pfizer vaccine, according to the Nordic agencies' data/studies?

It's been reported that some Nordic countries have suspended the Moderna vaccine from younger age groups, due to an increased incidence of myocarditis, seemingly relative to Pfizer. However, even ...
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What data supports the safety of COVID-19 mRNA vaccines for women of childbearing age?

I am looking for the actual data (ie, numbers) supporting the widespread consensus regarding the safety of the COVID-19 mRNA vaccines with regards to fertility, pregnancy, and childbirth, as stated ...
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If person got covid vaccine some time ago, should he get flu vaccine?

Say person got covid vaccine several months ago (say one of Chinese vaccines), is it safe to get flu vaccine? Best info I found was from CDC While limited data exist on giving COVID-19 vaccines with ...
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Why aren’t the CDC and WHO aligned on masking children?

My understanding is that the CDC recommends masking for children over 2, but the WHO recommends masking for (most) children over 5. Why the discrepancy? Is there a medical reason why either ...
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Why US (3 weeks)and UK ( 8 weeks) covid vaccine guidelines differs so much?

I read two differing opinions about corona, one from CDC that says get your second shot as close to the recommended 3-week or 4-week interval as possible Other from BBC UK, that says Covid vaccine: ...
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How can the J&J vaccine shot be effective against COVID-19 if it only has a ~60% efficacy rate?

According to the CDC's page on the safety of J&J vaccines, the reported efficacy rate of the vaccine is a staggeringly low 66.3%. That said, the government is still promoting and touting the J&...
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How do we know that mrna-hijacked cells with spike proteins are not harmful to the body?

If I understand mRNA COVID vaccines correctly, they contain some RNA that is inserted into a cell, which then is instructed to produce the spike protein, which is typical for COVID-19 viruses. Once ...
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Which countries recommend Covid vaccine for pregnant women?

It is still controversial if pregnant women should generally be vaccinated against Covid. As far as I understood, the US-american and English authorities recommend vaccination, while the Germans do ...
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What are the websites providing medical articles?

I'm new here and I'm not sure if my question is off topic, however I need some resources about medical articles concerning the effect of covid on health employees. I found a website called sci-hub but ...
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Was there a clear effect attributable to FFP2 (~N95) mask mandates in Germany in crowded environments (shops, buses, etc.)?

Back in January or so, Bavaria at least mandated FFP2 (roughly equivalent to US N95) masks be worn in shops, buses and presumably similar environments. At least Berlin followed suit some months later ...
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Corona virus and food transmission

I find conflicting info on this CDC cite it says Currently there is no evidence to support transmission of COVID-19 associated with food next it says It may be possible that a person can get COVID-...
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Is there UK data on the reduction in vaccine effectiveness for people who were vaccinated 5+ months ago?

Leaving aside the completely unvaccinated sections of the population (in themselves a huge problem), preliminary data from Israel and the US (in selected cohorts Mayo, CDC--on "frontline" ...
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booster does of pfizer if someone was vaccinated with sinopharm

I am curious if there is established practice of using pfizer as booster if person was vaccinated with sinopharm. One example I think is here which says it is possible https://www.timeoutdubai.com/...
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Is there a more recent official presentation (than Aug 11) on the Israel's Covid-19 vaccine effectiveness, particularly on the booster shot?

If found two-three previous ones (July, 2nd/longer variant, August 11), but Reuters claims on Aug 22 there's one about the booster effectiveness, and it's almost certainly not one of those three I ...
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what is risk of breakthrough infection with pfizer and delta?

There is varying information on this topic, does anybody know is there is any consensus on the rate of breakthrough infections with delta and pfizer vaccine? https://www.cnbc.com/2021/07/23/delta-...
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Does severity of covid vaccine side effects correlate with or suggest anything about how badly that person would have reacted to covid itself? [closed]

Let's say that a person has the covid vaccine and has a relatively bad case of the standard side effects. Does their reaction to the vaccine suggest that they would have also felt very poorly on the ...
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What are the risks associated with imidazoquinoline adjuvant (used in one Covid-19 vaccine) related to development of autoimmune diseases?

Covaxin is an inactivated virus-based COVID-19 vaccine developed by Bharat Biotech. Recently, the Brazilian health regulator Anvisa raised few concerns regarding Covaxin, one of which was- use of a ...
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Who can perfom a nasal swab in California?

What are the guidelines for who can perfom a nasal swab in the state of California? Previously I have heard from an MD that only a CMA, or LVN could perfom this procedure. If it helps I'm specifically ...
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Why was Comirnaty (Pfizer's COVID vaccine) FDA approval only for ages 16+, and not 12+? Will it be expanded to 12+?

From https://www.fda.gov/news-events/press-announcements/fda-approves-first-covid-19-vaccine: For Immediate Release: August 23, 2021 Today, the U.S. Food and Drug Administration approved the first ...
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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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Mix-&-Match of 3 COVID-19 Vaccines?

Now that getting the third shot of COVID-19 vaccine is allowed, which one of the following order of 3 vaccines will lead to better protection and more robust immune system response against Covid-19 ...
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How are decisions on sharing of ventilators made and how can risks of doing so be mitigated?

My wife is a respiratory therapist working in an academic medical center in the USA. She works daily with Covid 19 patients performing roles such ventilator management or assisting with intubation. As ...
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Vaccine efficacy to get FDA approval

What is the required efficacy level for a COVID-19 vaccine to get FDA approval? I heard the numbers 50% and 60% - but can not find any document which would explicitly say so. My concern is that two ...
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Immunoglobulin E (IgE) level and covid vaccine

I am finding hard to find information if a person has say higher than average level of Immunoglobulin E (IgE) is it safe to do covid vaccine?
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How does getting 2 or 3 shots of the Pfizer or Moderna COVID vaccine compare against 1 shot Johnson & Johnson's vaccine + 1 shot of Pfizer or Moderna?

I wonder how does getting 2 or 3 shots of the Pfizer or Moderna COVID vaccine compare against 1 shot Johnson & Johnson's vaccine + 1 or 2 shots of Pfizer or Moderna, in terms of COVID-19 ...
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Does the Pfizer vaccine efficacy wane faster than Moderna's?

Mothership.sg ran this headline: Moderna's Covid-19 shot 93% effective, 6 months after 2nd dose However, Pfizer reported that their shot efficacy would reduce to around 84 per cent over the same time ...
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How would a global vaccination campaign stop COVID-19, rather than favor new mutation?

According to this report by Public Health England (p.35): whilst vaccination may reduce an individual’s overall risk of becoming infected, once they are infected there is limited difference in viral ...
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For how long does one test positive for COVID-19 after being infected with COVID-19?

I read on https://www.thehealthy.com/infectious-disease/how-long-can-you-test-positive-for-covid/ (mirror): According to the CDC, you can test positive up to three months after exposure even though ...
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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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