Don't just make it up and spew it.
Provide data or admit you are shilling.
I cite and provide exported data from VAERS, a video walk through of the data analysis by a PhD researcher, and one from a medical data analyst.
In response, you make up a breezy excuse. All the trolls have breezy excuses for why all data must be contorted to fit 'the narrative'
Right?
Its getting to be like a cartoon with these people and their excuses and bogus analogies. It sure ain't science, das fo sho.
They sound like my little brothers when they got busted for stealing cookies.
(okay, and me too.*blush*)

The amount of undercounting will be related to people keeping their sheet, actually reading the sheet, figuring out if they have something to report, then completing the report without giving up because the website is too difficult. Or calling the hotline and getting put on hold (I have no idea how they staff the hotline).
Then the next contributor to underreporting is how much data is deleted by the CDC instead of being put into the public report that we download. There's no question there's a backlog those curves in the ransonnote vanity a few weeks ago show the gap. They also delete what they believe to be spurious reports (e.g. the incredible hulk report). How many reports are deleted and what do they contain (besides incredible hulk which we know was deleted).
I don't think the Harvard study, the 1% reporting that comes from here: https://digital.ahrq.gov/sites/default/files/docs/publication/r18hs017045-lazarus-final-report-2011.pdf is very applicable to the COVID vaccines. I think there's a lot more awareness with this vaccine and people report more events. Also there are a lot of headaches and fever being reported. But probably less than 1% of the actual headaches and fever.
There are 3,000 reports of mild headache or slight headache which is what I had (plus fever) and was not about to report it. It would be a waste of my time to report it and I'm sure many people feel the same way.
I hope the shekels make them happy....