A review by US regulators of the single-shot Johnson & Johnson coronavirus vaccine finds it is safe, especially against severe cases.
It paves the way for a third Covid-19 vaccine to be authorised in the US, possibly as early as this weekend.
The vaccine could be a cost-effective alternative to Pfizer and Moderna, as it can be stored in a refrigerator instead of a freezer.
The review was largely positive but more nuanced than for the other two.
The Food and Drug Administration found the Johnson & Johnson vaccine has “known benefits” in reducing both symptomatic and severe illness.