Professor Hoiby, message to world leaders

Please pass this video on, Dear Tim, Basically, we need to change the vaccine administration guidelines to include precautionary aspiration, prior to pushing in the vaccine. This will prevent cases of inadvertent intravascular administration of vaccine.

Here is some discussion to suggest inadvertent intravascular vaccine administration is a variable in the aetiology of complications after adenoviral vector vaccine administration and after mRNA vaccines.

These adverse events, although rare have reduced public confidence in covid vaccination, especially amongst the young, where vaccine rates are lowest.

It has long been known that intravenous injection of adenovirus leads to TTS in mice

Now, new covid vaccine specific work agrees with this previous work

Thrombocytopenia and splenic platelet directed immune responses after intravenous ChAdOx1 nCov-19 administration (29th June 2021)

The authors conclude, ‘Our work contributes to the understanding of TTS and highlights accidental intravenous injection as potential mechanism for post-vaccination TTS.’

‘We show that intravenous but not intramuscular injection of ChAdOx1 triggers platelet-adenovirus aggregate formation and platelet activation.’

‘Hence, safe intramuscular injection, with aspiration prior to injection, could be a potential preventive measure when administering adenovirus-based vaccines.’

Also after giving mRNA vaccines

A new study finds that giving mice intravenous mRNA vaccine also causes heart inflammation in mice.

Intravenous Injection of Coronavirus Disease 2019 (COVID-19) mRNA Vaccine Can Induce Acute Myopericarditis in Mouse Model (August 2021)

‘Our study indicates that IV injection of vaccines might partially contribute to this clinical phenotype, thus warranting a reconsideration of the practice of IM injection without aspiration, which carries the risk of inadvertent IV injection.’

Agreement from ‘fact check’ from Leo Nicolai, Cardiology Fellow, Ludwig Maximilian University of Munich:

(German Centre for Cardiovascular Research)

‘Indeed, there is peer-reviewed work showing in mice that possibly intravenous injection of mRNA vaccine leads to myocardial inflammation.’

‘that intravenous injection of adenoviral vector based vaccine (AZ1222, ChAdOx1) leads to thrombocytopenia and platelet-directed immune responses, offering a possible explanation for vaccine-induced thrombosis/thrombocytopenia’

‘these data might indicate a simple measure to lower the incidence of vaccine-induced side effects,’

‘There is a lack of data on frequency and effects of IV injection in humans.’

Denmark has changed their national guidelines—2021

Based on a precautionary principle, we recommend aspiration before injection.

Evidence from Dr. Peter Gaillard (microparticulate pharmacologist)

Case study evidence

Metallic taste in the mouth seconds after ‘intramuscular’ mRNA vaccine administration, (in the absence of an allergic reaction)

Other video-based discussions

26th September 2021

30th September 2021

Written by Dr. John Campbell

Hello Everyone,My name is John Campbell and I am a retired Nurse Teacher and A and E nurse based in England. I also do some teaching in Asia and Africa when time permits. These videos are to help students to learn the background to all forms of health care. My PhD focused on the development of open learning resources for nurses nationally and internationally.


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  1. Thank God i came across a book by Dr. Sarfraz Zaidi on D3 "Power Of Vitamin D" in 2015 and implemented its findings on my family. I believe it may well have saved us from this little bump in the road and will contribute to life long better health. Invaluable. You Dr Cambell are doing a great job in highlighting so much more.

  2. I requested aspiration, told it was against the protocol and they would get into "trouble" if they did it. They have a huge thick book of procedures, which says not to aspirate! Scotland.

  3. Hello everyone, I am advancing my career in Infection Prevention and Control. After watching the video, I emailed the CDC because I live in the US. I received this explanation on the need to aspirate when injecting the vaccine intramuscularly. This is the response:
    Thank you for contacting CDC. Needle aspiration is not required before vaccinating. If one injects into the correct site, one will not inject into a major vessel. If someone aspirates and draws back blood, it does not mean they’ve cannulated one of the many small/medium sized vessels at the correct sites. If one did happen to actually cannulate a small/medium vessel with a syringe needle, the injection would blow out the vessel and not inject vaccine into the circulation. The process of aspiration is more painful and unnecessary. Furthermore, when blood is drawn back, nursing protocols require nurse not to inject the vaccine, because the vaccine is now mixed with blood in the plastic syringe barrel, so the vaccine is wasted and another dose has to be given. There are no reports of any person being injured because of failure to aspirate (ACIP Vaccine Administration Guidelines for Immunization | CDC).

  4. Here in BC, Canada…the nurse told me that he was specifically told not to aspirate during my COVID-19 shot after I requested it to be performed on me. I did not get any COVID-19 vaccination shot with the aspiration technique. This upset me.

  5. I remember when you were first advising aspiration. When I went to schedule my JnJ shot they asked if I had any special notes. I said yes. ASPIRATE.. The lady on the other end was happy to put it in. When I went to my appointment, the nurse saw it and asked why. I told her I didn't want an accidental intravenous injection. She was happy to comply and I watched and no blood. Good injection. She told me that they don't teach aspiration anymore.. I told her to watch your channel. She got back to me and said, wow! This could avoid a lot of things.. good work Doc..

  6. Here in Ireland, we are seeing a very similar picture to what you have been discussing on aspiration. Last week at my local vaccination centre, the nurse on duty said that she could not aspirate as it was not HSE (Health Service Executive) policy to do so. I explained the technique to her, however she began to get irritated and uncomfortable, and could not make a valid argument for why, such a simple technique could not be carried out. This is what we are having to deal with. Thank you Dr. Campbell for your continued work. Collectively, we need to change the minds of these policy makers.

  7. It seems that in the United States they are trying to reach herd immunity by treating people like a herd of sheep, until now this information is no where to be seen on any media outlet or or heard about from the CDC .
    Thank you for this valuable and might be life saving information for many people.

    Greetings from Cleveland, Ohio. USA.

  8. This is infuriating, I know Campbell has been covering this for almost a year it seems. I will walk out of my next shot, too, if aspiration is refused. I absolutely don't understand why this is a questioned issue!!!

  9. What about the side effects that start three months later with D-Dimer at 10,000? These people do not develop symptoms right away, but have strokes months later, people in their thirties. Or, they develop neurological issues a month later. How is this explained by aspiration vs. no aspiration. This is not the explanation of side effects whatsoever. This is only applicable to side effects that start right away.

  10. The 'message to world leaders' is seriously about… aspirating the needle? People across the globe are being prevented from entering hospitals, trains, bars, restaurants, concerts, they're being fired from their jobs and fined based on their vaccination status, and your message is not 'please respect people's right to freedom, life, and bodily autonomy', or anything like that, but 'please aspirate the needle'? Pretty underwhelming message. Scientists and doctors have the responsibility to tell our leaders to stop using covid as an excuse to discriminate and ruin the lives of the unvaccinated. Do better.

  11. It appears that in the UK vets aspirate their syringes when vaccinating cats but we don't bother for humans.
    I am not a medical person but I have been following this aspect of how we have mismanaged the Covid pandemic in the UK with increasing frustration. What harm would it have done to aspirate whilst the real specialists considered the existing evidence for aspirating versus not aspirating. I fell so sorry for those, and their families, who have suffered illness and in some cases worse because of our public health bodies incompetence.

  12. Campbell's lucky – Zawahi didn't reply to my e-mail. Perhaps mine had a different perspective on medical tyranny and the tone wasn't as agreeable on the government's corona performance.

  13. I had my booster jab to day in the UK, I asked for aspiration the nurse refused saying we don't do that here. When she removed the needle blood came out of the injection site!

  14. UK vaccinator training manual says NO NEED to aspirate because there are no major blood vessels.
    Prof hoiby explains so eloquently why that is not correct.
    I didn’t know about aspiration and had metallic taste in mouth immediately after vaccine, but vax centre staff not interested and sent me away . Am still not feeling 100% 8 months later!
    Haven’t had booster yet. Very hesitant.

    Am just starting Artemic/Cimetra to try and reduce inflammation: a clinical trial is just starting on it for long Covid, and I was told post vaccine it could help as well. Its nutraceuticals so not “dangerous”.
    DR. CAMPBELL, happy to discuss with you and send you more info/pdf clinical trial results etc: 100% success in reducing inflammation & cytokine storm, with mild/moderate Covid patients in hospitals.

  15. Forgot to add: my sister had booster and nurse vaccinator was happy to aspirate: she said they always do it in her practice but had been told not to aspirate for Covid vaccine as per the manual.

    What some people don’t realize is that some vaccinators are NOT originally medically qualified: they are trained ONLINE for vaccinator job and then do assessment/supervised vaccinations before being let loose on unsuspecting people.

    So they wouldn’t know about aspirating anyway.

    I had a technician do first vac, and then a senior doctor did 2nd… (AstraZeneca ) both times metallic taste immediately within minutes. As I wrote above, No one interested.

    My GP didn’t want to know either, and thankfully, apart from the fatigue and brain fog and jitters since vaccine, I am healthy and never go near GP surgery!

    So, how do I get medical exemption for booster?
    Or what guarantees if I have booster (which I would need for work … Grrr coercion!) even with aspiration, that I won’t continue with these challenges? And this is mixing a Pfizer shot After astrazeneka (allbeit many months since 2nd vax)
    I am one in million Extreme severe allergic reaction to an anti nausea drug (found out many years ago), and itching (pre anaphylaxis) on first (and only) dose of an antibiotic.. But GP says that’s not a reason for medical exemption….

    Your input appreciated Dr JOHN and everyone else

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