Japan's health ministry has listed inflammation of the heart muscle and of the outer lining of the heart in younger males as possible serious side effects of the Moderna and Pfizer COVID vaccines.
It says that as of November 14, out of every one million males who had the Moderna vaccine, such side effects were reported in 81.79 males aged 10 to 19 and 48.76 males in their 20s.
The figures were 15.66 and 13.32 respectively for those who had the Pfizer vaccine.-- excerpt, rest at link above --
"I wish it need not have happened in my time," said Frodo.
"So do I," said Gandalf, "and so do all who live to see such times. But that is not for them to decide. All we have to decide is what to do with the time that is given us."