A puzzling form of hepatitis is now in both the US, and here in Europe. The viruses that typically cause the illness - hepatitis A, B, C, D and E - have been ruled out, so the cause for mainstream medicine is still a mystery. Adenovirus type 41, has been hypothesised as a possible cause. Nothing, of course, about a possible Covid vax connection though, and it is known that the spike proteins accumulate in the liver. The disease has been so severe, that one child required a liver transplant.
https://www.zerohedge.com/geopolitical/dozens-cases-mysterious-hepatitis-crop-us-europe