Preliminary research seems to suggest that most COVID vaccines offer almost no defense against infection from the highly contagious Omicron variant.
In particular, vaccines from AstraZeneca, Johnson & Johnson and those manufactured in China and Russia do little to nothing to stop the spread of Omicron, early research shows. And because most countries have built their inoculation programs around these vaccines, it could have a profound impact on the course of the pandemic.
The good news for Australia is that the only vaccines that appear to be effective against infections are those made by Pfizer and Moderna, reinforced by a booster. Both are the vaccine of choice in Australia. From the New York Times:
