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Said before. https://www.crsociety.org/search/?&q=needle aspiration covid-19&search_and_or=or&sortby=relevancy

that doesn't makes me more comfortabel getting my vaccination. Here a link how this question was answered a few years ago, the changed protocol not to aspirate stinks imo and since this Covid-19 vaccination is closely monitored it is now revealing far more precise the (deadly) side effects due to injecting in the veine, which are easily preventable. So why take a risk ? https://www.ntvg.nl/artikelen/hoe-zinvol-het-opzuigen-van-de-injectievloeistof-na-het-insteken-van-de-injectienaald-voor/volledig How useful is drawing up the injection fluid after inserting the injection needle for the intramuscular administration of vaccines? ANSWER. Some vaccines are injected intramuscularly. It is good practice that after the injection needle has been inserted to the correct depth, the plunger of the syringe is momentarily withdrawn while the needle is fixed to verify that no blood vessel has been punctured. If so, the needle can be repositioned or re-pricked. The empty artis injection also requires that the injection site is properly fixed so that the needle does not move after the correct injection position has been established. It is undesirable that vaccines are injected intravascularly, especially at the high speed associated with an intramuscular injection. Due to the local depot effect, an optimal immunogenic concentration of the vaccine must be built up; systemic 'leakage' of these may reduce the immune response. Acute side effects can also occur when vaccines, often of a special composition (bacterial suspension, aluminum phosphate or hydroxide gel), are introduced into the circulation in high concentration. This may be manifested by anaphylactic reactions due to sudden massive antigen-antibody reactions, or signs of drug embolism due to the precipitation of poorly soluble substances; irritation of the vessel wall can also occur. 1In practice, these reactions occur extremely rarely, possibly partly due to the good way of injection. In infants or toddlers who are struggling to get out of the fixation required for an injection, it is not always possible to prevent the needle from moving due to the movement after monitoring and the vaccine from entering a blood vessel. Also, some have a habit of not doing the check at all. They say they have never seen any direct adverse effects of this, but the chance that a larger blood vessel will be punctured is small. Reduced efficacy is of course not apparent immediately after vaccine administration. The vaccine can also end up in a vessel or subcutaneously with the still used, but incorrect way of injecting, in which the liquid is injected backwards. Due to the low risk of major consequences, it is recommended to check the position of the needle using a relatively simple method of drawing up liquid before injecting.

I am not (yet) aware of problems with the mRNA vaccins in relation with blood cloths and thrombocytopenia. There are risks with the AZ vaccins, although they are very rare, as you should aspect if the aspiration hypothesis is true. Although they are rare they are certainly real and every case is one to many if it is this easy to prevent. The rational to proceed the vaccination campagne is the worse outcome in death counts in the not vaccinated ones. Btw: https://www.bbc.com/news/world-europe-56580728 and https://edition.cnn.com/2021/03/30/health/astrazeneca-germany-vaccine-intl-grm/index.html Germany will only administer AstraZeneca's Covid-19 vaccine to people aged 60 and above, Chancellor Angela Merkel said Tuesday, following the advice of the country's vaccine committee. The move follows reports of rare blood clots in the brains of 31 people following the first dose since the shots started being administered in the country.

Google translate (right click and choose translate) if you use chrome 😉 , here a snerp Covid-19 vaccines should be given with aspiration before injection Based on a precautionary principle, the Statens Serum Institut has now announced that aspiration is recommended for all approved covid-19 vaccines. It is otherwise a practice not followed in the general guidelines, and it has created confusion. Created: 20.03.2021 Marianne Bom, redaktionen@dsr.dk The Danish Health and Medicines Authority's guidelines have long recommended this, and now the Statens Serum Institut is following suit. Thus, there is agreement between the two authorities that a special precautionary principle should apply when vaccinating against covid-19. Vaccination personnel should ensure that they are injected correctly into a muscle and not into the bloodstream by withdrawing the plunger of the needle slightly, aspirating, before administration. This was announced by the Statens Serum Institut on 18 March following reports of a possible connection between the AstraZeneca vaccine and rare but serious side effects with blood clots and bleeding. Usually, according to the health authorities, one does not need to aspirate before injecting a vaccine. The AstraZeneca vaccine was paused in Denmark on 11 March for a preliminary two weeks after reports of these rare, serious possible side effects.

Poor technique may be responsible for serious side effects of covid-19 vaccine Covid-19 vaccines (ASTRA ZENECA) should be given with aspiration before injection. In Europe they do not aspirate so here you must ask/negotiate with your general practitioner to aspirate before injecting. This vaccinating protocol was recently changed here, I don't know what the protocols are in the US. Based on a precautionary principle, the Statens Serum Institut has now announced that aspiration is recommended for all approved covid-19 vaccines. It is otherwise a practice not followed in the general guidelines, and it has created confusion. "If the vaccine is given incorrectly and hits the bloodstream - and not just the shoulder muscles - it can in the worst case give such a violent, systemic and inflammatory reaction that it can lead to many small blood clots in, among other things, lungs," said Niels Høiby, professor and chief physician at the University of Copenhagen and Rigshospitalet for the journal. Health recommendations can be read in the "Guideline for the management of vaccination against COVID-19" from February 5 to sst.dk . The Statens Serum Institut's report of 18 March can be found on ssi.dk under the tab "Injection technique" and "Intramuscular injection in children and adults". https://dsr.dk/politik-og-nyheder/nyhed/covid-19-vacciner-skal-gives-med-aspiration-foer-injektion