The Federal Government has announced changes to the national COVID vaccine rollout.
Australians under the age of 50 are being advised to only receive the Pfizer vaccine amid concerns about a number of cases of blood clots linked to the AstraZeneca dose in younger people.
Evidence from the UK shows the risk of a blood clot is about four in one million.
Prime Minister Scott Morrison says they don’t want to take any risks.
“It is an abundance of caution, it’s a caution that is being exercised consistent with many other countries around the world, and we would expect to see that also continue in other countries now making similar decisions,” said Mr Morrison.
Those who have received their first dose of the AstraZeneca vaccine without adverse side effects are being told they are safe to get their second.
The change in health advice will impact the nation’s vaccine rollout timeline.
Australia has purchased 20 million doses of the Pfizer vaccine, but has been planning to rely more heavily on the AstraZeneca jab.
First deliveries of the Novavax vaccine – which is yet to receive regulatory approval – aren’t expected until later this year.