There's a recommendation in Ontario (Canada) against giving Moderna to males 18 - 24

"Ontario now recommending against Moderna vaccine for men 18-24 years old" https://torontosun.com/news/provincial/ontario-now-recommend...

This comes after public health officials determined there is a 1 in 5,000 risk of myocarditis — a form of heart inflammation — following a second dose of the Moderna vaccine.