All Questions
23 questions
5
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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 ...
- 51
1
vote
1
answer
89
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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 ...
- 11
2
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0
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44
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Using Pfizer as a booster dose if someone was vaccinated with Sinopharm: what is good practice? [closed]
I am curious if there is established practice of using Pfizer as a booster dose if a person was vaccinated with Sinopharm.
One example I think is here which says it is possible
https://www....
- 21
0
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1
answer
76
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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-...
- 1
3
votes
1
answer
161
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Why is booster shot needed when mRNA vaccines can induce memory cells?
My understanding about mRNA Covid-19 vaccines and memory cell is that they do induce memory T cell response similar to natural infection, and thus provide long term protection via the memory cell ...
- 545
0
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0
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52
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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. ...
- 101
2
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0
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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 ...
- 151
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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'...
- 111
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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 "...
- 2,021
1
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0
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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 ...
- 157
4
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0
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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 ...
user20181
1
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0
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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, ...
- 261
8
votes
2
answers
176
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Will the COVID-19 vaccine grant immunity to other coronaviruses?
As I understand it, the mRNA vaccine teaches the immune system to recognize and attack the spike protein on the surface of the novel coronavirus. Don't all coronaviruses share this same spike protein? ...
- 183
3
votes
1
answer
167
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How can a vaccine prevent an individual from getting a disease but not from transmitting it?
In the news about the COVID-19 vaccines which are about to begin distribution, I've seen statements to the effect that "it’s not clear if the shot keeps the disease from being transmitted" (...
- 621
4
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1
answer
151
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Covid vaccine side effects [closed]
The Pfizer Covid vaccine caused allergic reactions. For patients that are deemed to be at an increased risk of adverse side effects following a risk assessment (e.g. because of diabetes, heart disease)...
- 159
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3
answers
66
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Why COVID-19 "immunogenicity may be 70%"?
The USA CDC director Dr. Robert Redfield was recently quoted in the media as saying:
"I might even go so far as to say that this face mask is more guaranteed to protect me against Covid than ...
1
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0
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77
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Is inoculation against covid-19 an option?
Covid-19 can cause serious illness or death, and it can take survivors a very long time to recover, and even then it is unsure if recovery will be complete.
The policies put in place to curb the ...
- 149
4
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1
answer
109
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Can this method of immunization for horses serve as a COVID-19 vaccine for humans?
A group of scientist developed Equine polyclonal antibodies (EpAbs) obtained after immunization of horses with the receptor-binding domain of the SARS-CoV-2 viral Spike glycoprotein.
https://ri....
0
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0
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24
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How to measure how long does a vaccine last?
Recently I read someone arguing against pharmaceuticals saying COVID 19 vaccine immunity would last around a year. His argument was that how do they know that it's good for a year if a year has not ...
- 17
1
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0
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23
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Can SARS-CoV-2 possibly overcome herd immunity without mutation in densely populated countries and places? [closed]
Can the coronavirus that causes covid-19 possibly overcome herd immunity without mutation using immune individuals as hubs till it reaches vulnerable individuals in very densely populated countries ...
- 121
1
vote
1
answer
125
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What is the long-term COVID-19 outlook?
Finding a cure for the common cold has long been an unattainable holy grail of medicine.
The common cold is caused by over 200 different strains of viruses (Common cold - Wikipedia).
The viruses ...
- 631
10
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2
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161
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Are there diseases for which infection does not grant lasting immunity but a vaccine does?
There has been a lot of discussion about whether people who have COVID-19 and recover will have long-lasting immunity. At the same time, work is underway to create a vaccine for this disease. But if ...
- 621
1
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1
answer
117
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How would the tuberculosis vaccine (BCG) decrease severity of COVID-19?
Two academic hospitals in The Netherlands (Nijmegen and Utrecht) just got approval to experiment with using a tuberculosis vaccine (BCG) to try to better protect hospital workers against coronavirus.
...
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