What are the ingredients in the COVID-19 vaccines? Here what's in the Pfizer and AstraZeneca jabs Posted TueTuesday 2 updated ThuThursday 25 The two COVID-19 vaccines so far approved for rollout across Australia. ( Share Print text only Cancel As Australians start to roll up their sleeves for their COVID-19 vaccine, many people have been wondering — what's actually in the Pfizer and AstraZeneca jabs? Key points: They both come in multi-dose vials, but only the Pfizer needs diluting Pharmaceutical ingredients are added to stabilise the vaccines Both coronavirus jabs use new technologies to train the body's immune system, teaching it to recognise and fight the spike protein of