New Scientist: Now a study in the US has analysed how often myocarditis occurs following infection with the coronavirus.

Great.

Researchers analysed the records of healthcare organisations that cover a fifth of the US population. They found that, during the first 12 months of the pandemic, males aged 12 to 17 were most likely to develop myocarditis within three months of catching covid-19, at a rate of about 450 cases per million infections.(45 per 100 000)

3 months is a very wide net. With no indication of whether it was caused by Covid or they simply had an attack in that timeframe. Are you using the same 3 month window post the vaccines?

Secondly, if they're in hospital, they're severe cases of Covid - so the figures don't include the percentage of mild or asymptomatic cases, thus skewing them significantly.

Thirdly, Omicron is known to be relatively mild - but the potency of the vaccine hasn't changed - it gets progressively higher in fact.