My friend, Dr Sebastian Rushworth, a Swedish Physician, wrote a scientific analysis of this issue. Here is his summary:
To sum up, covid is not a threat to children. At least not more of a threat than many other risks we take for granted and happily let our children take, like riding in cars and crossing streets. In order for it to make sense to vaccinate children with this being the case, it has to be clear beyond any reasonable doubt that there are virtually zero risks associated with the vaccine. Why? Because if the covid vaccine is associated with even a very small risk of harm, then the risk associated with the vaccine could well be greater than the risk associated with the infection. Since it is at present far from clear that vaccination is less risky to children than infection, it is deeply unethical to vaccinate them.
If we go ahead and vaccinate children because we hope that it will marginally decrease the risk to adults (on top of the risk reduction already seen from vaccinating almost the entire adult population), then we are putting our children at risk for our own gain. We should be the ones taking risks for our children. It shouldn't be the other way around.