Denmark’s SSI recommends changes to syringe injection method for coronavirus vaccines “Usually one does not need to aspirate before injecting a vaccine. More... March 22, 2021December 29, 2022 Coronaheadsup.com Astrazeneca, Coronavirus, Denmark, Europe, Health, Janssen, Karolinska Institute, Moderna, Pfizer/Biontech, Science, Side Effects, Sinovac, Sputnik V, Treatment, Vaccine