Well, each bag contains around 200 M&Ms apparently. So 1/50,000 bags would kill you. Therefore if you eat a bag a day, that's 20 micromorts a day, which is like going sky diving or scuba diving twice a day.
The difference is that you only need to get vaccinated once (or twice if we're counting both doses). So if the bag of M&M's will also stop you from getting Covid, I think you should take it.
Oh, fair enough.
No problem with that though.
Say, one out of... heck, 30 million of MARS sticks is deadly.
And for M&M let's make it "per bag", shall we.
So you know for a fact that:
1) one out of 30 million of MARS sticks
2) one out of 10 million bags of M&M
kills. Micromorty enough?
OK to eat ten bags of M&M and ten MARS stick (and, say, stop afterwards)
And to make it a point: death is... something rather serious that we humans tend to minimize risk of.
In this case, we have other deadly source.
So it becomes about managing the risks.
Had there been no good alternatives, the choice would have been obvious (although many would still opt for no vaccination, heck, nearly all women that I know). But with other vaccines in town, if there is a choice of micromorty thingy today, or non-micromorty tomorrow, why take micromorty?