Here's the problem: we don't have enough information on long term damage. It could be that there are none, it could be that we'll see them in decades (like shin

Here's the problem: we don't have enough information on long term damage. It could be that there are none, it could be that we'll see them in decades (like shingles). We do not know. Since we do not know, we need to play it safe. If we are wrong, nothing will happen. If we are right, we have avoided long term damage.