Swedish health officials have now decided that a moratorium on giving the Moderna vaccine to anyone under 31 will be extended indefinitely, the U.K. Daily Mail reported. The pause on the Moderna shots had been scheduled to end on Dec. 1.
Finland, Iceland and Denmark have taken similar steps. Norway is encouraging men under 30 not to get the Moderna shot, but is not mandating it.
For months, the Moderna vaccine has been under scrutiny because of data that shows young men who receive it are at increased risk for myocarditis, an inflammation of the heart muscle, and pericarditis, an inflammation of the sac around the heart.