I have a genuine question here, that I've tried to find the answer to before and struggled to get good data on. I'd really like to understand the actual size of

I have a genuine question here, that I've tried to find the answer to before and struggled to get good data on. I'd really like to understand the actual size of dosages that you get from both the vaccines and different kinds of viral infections, in comparable units. For example a table mapping viral load in PCR cycle thresholds to microgram dosages of the different brands of vaccines. The assertion that the vaccines give you way less mRNA / cell death than the actual virus sounds like it should obviously be true, but I can't find any papers that measure it, and I keep encountering people for whom the vaccine appeared to actually give them COVID for a day or two. I've also known people who had COVID naturally and whose symptoms and duration was pretty much the same as those people reporting bad side effects from the vaccines, which I'd guess is somewhere between 25%-50% of people taking it, judging from my social circle, but it's hard to know exactly. The best info I could get is that dosages were obtained by simply starting really low and then steadily increasing it until antibody titers were high "enough" and side effects were still considered tolerable. However the dosages of some brands are much higher than others. At that point information became proprietary and I couldn't go further. Still, given the wide range of severities of infections it's not totally clear why this process was expected to yield a drastically lower dose than all possible viral infections.