Questions tagged [vaccine]

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Why is post exposure vaccines given for some diseases & why does it work?

A vaccine essentially simulates an infection so that our body produces antibodies against it & thus helps when we actually get infected in the future. But for some diseases, we see post exposure ...
user93353's user avatar
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1 vote
0 answers
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CDC Temperature Requirement for Vaccines

We're facing a problem within several health facilities regarding vaccines storage. The CDC requirement for vaccines is to be kept in the 36°F - 46°F (2°C - 8°C) range, or equivalently, in the 41+-5°F ...
Brethlosze's user avatar
1 vote
1 answer
101 views

Can you get shingles if you never have had chickenpox but got the chickenpox vaccine?

Some sources say it's possible, while others say the opposite. The following links are just some of the examples. But in theory you need to have had chickenpox first before you can get shingles. Isn't ...
Maurice's user avatar
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1 vote
1 answer
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is Typhim Vi a live vaccine?

I have contacted 2 local pharmacies, one informed me Typhim Vi is a live vaccine, while the other one told me it is not. I have searched online and was not able to find a conclusive answer. CDC only ...
Maurice's user avatar
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1 vote
1 answer
112 views

Can patients receive SHINGRIX together with TWINRIX or AREXVY?

Can patients receive SHINGRIX (Recombinant Adjuvanted Zoster Vaccine) together with other vaccines? Specifically either: TWINRIX (Hepatitis A & Hepatitis B Recombinant Vaccine) AREXVY (...
Maurice's user avatar
  • 145
-1 votes
1 answer
60 views

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 ...
Bishop D's user avatar
3 votes
0 answers
64 views

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 ...
Vercidium's user avatar
1 vote
1 answer
59 views

What does negative vaccine efficacy mean in the attached article?

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8816388/pdf/main.pdf In the above article in figure 2, which is on page 8, the diagram shows vaccine effectiveness over time. At a certain breakpoint, it ...
Bishop D's user avatar
4 votes
1 answer
86 views

Did 79% of pregnancies in an early COVID-19 vaccine study result in loss?

I just came across a paper published last year concerning the safety of covid 19 vaccines in pregnant women. I read the following sentence in the abstract: Among 3958 participants enrolled in the v-...
Bishop D's user avatar
3 votes
1 answer
78 views

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 ...
End Anti-Semitic Hate's user avatar
1 vote
0 answers
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What makes it hard to develop vaccines for Syphilis and Gonorrhea?

Hope my question is more specific than Why are some viruses harder to make vaccines for? Both Syphilis and Gonorrhea are caused by bacterial infection, rather than virus like HIV or COVID, which ...
No One's user avatar
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2 votes
0 answers
68 views

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.
Beans's user avatar
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-2 votes
1 answer
108 views

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 ...
Sedumjoy's user avatar
  • 297
-1 votes
1 answer
60 views

Why did we get the MRNA-Vaccines for COVID before the "traditional" vaccines with inactivated coronavirus-components?

i was wondering what the reasons, were, why got the MRNA-Vaccine faster, than the "traditionally" produced vaccines with inactivated viruscomponents. What were there reasons behind that?
John's user avatar
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6 votes
1 answer
110 views

Why do some vaccines have only a short protection span?

Why does the rabies vaccine have only a limited longevity of around 2 years (source: immunize.org), while the hepatitis b vaccine has a longevity of more than 25 years (source: CDC)? In addition, if ...
Snowflake's user avatar
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5 votes
0 answers
105 views

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 ...
Jacek Kołodziejek's user avatar
-3 votes
1 answer
179 views

Are vaccines much more deadly than people (and scientists) think?

In the response to the question Are Covid-19 vaccines much more deadly than people (and scientists) think? is mentioned that "Docs are instructed not to report deaths after a flu vaccine that are ...
Erdel von Mises's user avatar
2 votes
1 answer
842 views

Why is aspiration not commonly used for IM vaccine administration in the U.S.?

The CDC says it is "not necessary". I asked my local pharmacy and they will not do it even upon request and I am OK with that. But I have a question. By accident I happened to see a video ...
Sedumjoy's user avatar
  • 297
10 votes
2 answers
12k views

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 ...
Toc's user avatar
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4 votes
1 answer
137 views

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 ...
Keshav Srinivasan's user avatar
0 votes
0 answers
42 views

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&...
yuritsuki's user avatar
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0 votes
0 answers
39 views

Covid vaccine second dose side effects and immunity

Does experiencing side effects such as fever/headache/muscle ache after the second dose of vaccine mean that immune system is weak and catching covid would have been more dangerous in comparison to ...
Michael Metreveli's user avatar
0 votes
1 answer
45 views

What is the recommended interval for HPV vaccines such as Gardasil 9 for women and men up to age 45?

In October 2018, the US Food and Drug Administration announced it had expanded the approved age for the HPV vaccine up to age 45 for women and men. In June 2019, a key advisory committee for the US ...
Bob Ortiz's user avatar
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-1 votes
1 answer
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How does Pfizer vaccine affect covid test?

Medical question on possible outcomes of tests. Assuming patient does NOT have actual covid. Perfectly Healthy A patient gets a Pfizer vaccine first dose today. Will the patient’s Covid nose swab ...
user23762's user avatar
-4 votes
1 answer
74 views

What is the authoritative US document that delineates concrete standards for vaccine approval?

What is the authoritative US document that delineates concrete standards for vaccine approval? Presumably said document would be from the FDA. By concrete, this should include all measurable ...
gatorback's user avatar
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1 vote
0 answers
55 views

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 ...
Jade R.'s user avatar
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1 vote
3 answers
145 views

Are viral loads in vaccinated people only infectious with the delta variant? If so, why not with previous COVID-19 variants?

I'm reading on https://sfist.com/2021/07/27/cdc-confirms-that-viral-loads-in-vaccinated-people-with-delta-are-indistinguishable-from-unvaccinated/ (mirror): CDC Confirms That Viral Loads In ...
Franck Dernoncourt's user avatar
0 votes
3 answers
308 views

Why are mRNA vaccines not yet available against other diseases?

The mRNA vaccines against developing COVID-19 are obviously the first approved mRNA vaccines. We are probably at the beginning of an mRNA vaccine evolution. I've recently read a very interesting ...
Bob Ortiz's user avatar
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0 votes
0 answers
66 views

(How) does taking all available vaccines contribute to cross- and trained immunity?

Many countries have national vaccination campaigns that consists of vaccines against several different diseases. I expect that the choice of vaccines that are included in such programs is mainly ...
Bob Ortiz's user avatar
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0 votes
0 answers
26 views

If you've already been infected with SARS-CoV-2, do the vaccines cause fewer side effects?

Assuming that I had Covid-19 not so long ago. My body should have produced some type of antibodies to defend against the infection*. If I now get one of the vaccines, would it be more likely that ...
CherryBlossom1878's user avatar
0 votes
1 answer
144 views

A recent Israeli study found the Pfizer COVID-19 vaccine to have only 64% efficacy against the Delta strain - is that with full vaccination?

The numbers from Israel (https://www.bloomberg.com/news/articles/2021-07-05/israel-sees-decline-in-pfizer-vaccine-efficacy-rate-ynet-says) indicate the Pfizer vaccine is quickly losing efficacy ...
user1258361's user avatar
10 votes
1 answer
297 views

Can the HPV vaccine be effective if you are already infected? [closed]

I was just wondering about this subject, when I did a blood exam today and I picked a paper about available vaccines and I saw a vaccine against HPV, the same my mom always bothered me to take it. I'm ...
Freedo's user avatar
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