> I take pretty strong precautions, including proper masks

Will you take this strong precautions forever?

I may be wrong (because what do I know?), but my assumption is that COVID will become endemic and sooner or later we'll all get it. I don't know that for sure, I didn't spend a lot of time following the numbers and reading right and left about this topic. I just can't devote significant time into doing a "proper study" of the matter. So, instead I'm going to apply my personal heuristic, like everybody else.

In my previous comment I shared my personal heuristics about "can the government effectively hide the dangers of the vaccine?"

Here I'll respond to whether I believe it's rational to not get vaccinated because other people will be vaccinated and the problem will go away without me risking it:

From what I could see, COVID seemed to be very transmissible; despite strong social distancing and lockdowns the contagions kept going. The only way to stop it would be to either doing a prolonged and airtight global lockdown (hard to implement) or to have a vaccination rate that exceeds the herd immunity threshold.

And this vaccination level has to be maintained throughout the world, or else we have to lock down travel in perpetuity, which is again, IMO hard to implement.

Currently we do observe regional variation in covid spread; my intuition is that a lot that can be attributed to the "reverse tinkerbell effect": we're avoiding travel, in some cases forbidding travel, testing people who travels; we cannot reach the conclusion that if you live in an area where vaccination level is high you're going to be fine; as soon as travel resumes you'll encounter unvaccinated people more often.

As I said, I don't know; it's just a heuristic. I think it's possible that I'll catch covid in the next few years. Let's put a generously low probability of 0.1%. Then let's attach a generously low probability of having serious problems if I do catch it, again 0.1% (probably higher than that, but lets be generious). With those number I'd have a chance of one in a million to get severe problems of covid in the near future.

There have been 3.4 billion doses of vaccine administered so far; if 1 in a million of them had severe side effects, that would mean 3.4 million people would be affected; I think somebody would have noticed. This is why I was focusing on addressing whether the governments can actively hiding this problem. That's the main counterarguments I hear to my heuristic about pros/cons of getting the vaccine now, namely that there are indeed million of people who're suffering from the vaccine but we don't know about them because the government is lying (I find this hard to believe; I cannot rule that out logically, but my credence in that proposition is quite low)

I think I will take strong precautions forever, if needed.

I think COVID19 spread because, at every point, people said "It can't be that bad," and it turned out it was. Our response was characterized by wishful thinking.

People can and do catch COVID19 multiple times, and that will only increase as it mutates. Let's start with your assumptions and go one level deeper:

1. COVID19 is highly transmissible

2. COVID19 will become endemic

3. You'll be exposed to COVID19 multiple times

With vaccine breakthrough rates of 5% for the original, and perhaps 20% for delta, and more with growing mutations, you'll catch COVID19 multiple times. Each time, you'll lose a little bit of gray matter in the brain, and sustain other damage. By the time you're old, you'll be a drooling, exhausted zombie idiot.

This makes a lot of additional assumptions, a key one being that breakthrough and brain damage are random events (as opposed to e.g. at-risk individuals), but it is a plausible scenario. We can argue about whether it's 20% odds or 80% odds, but it's definitely not 5% or 95%.

From my perspective, social distancing, masking, and similar just aren't that bad relative to even a moderate risk of the alternative. Proper masks are $2 (ones that filter down to <300nm), mildly uncomfortable, and more effective than vaccines. If we assume independence, proper mask+vaccine+modest social distancing reduces odds of infection to be infinitesimal. I don't believe in independence, but they certainly reduce R0 below 1. Why not?

To be clear, it's not that I think people are dying en masse from vaccines and being covered up. What I'm mainly concerned about are permanent side effects and long term dangers.

Now, regarding long term side effects, there are a lot of "alternative news" sources, and random internet anecdotes, which claim relatively common heart problems following vaccination, and some stories of healthy people dying a few days later, though these deaths can't be explicitly linked to a vaccine necessarily. These sources are not more trustworthy than the mainstream media, but if the 2020 election has shown anything, it's that the media is willing to die on the hill for their narrative. These alternative sources are the same sort that were correct about Russiagate and other such media nonsense. So I can trust neither side, and there is at least some fringe evidence that the vaccines are worse than we know.

About long term effects appearing, I can't know if this is possible, and I can't trust anyone who says they do know, since it has been so politicized. There are actually medical doctors who say it could be dangerous in this way, so again, I can't know whether they're crackpots or if a large number aren't just fearful for their jobs and such. If you were a researcher right now and you had some evidence to believe this vaccine could be dangerous long after the injection, I find it hard to believe you could get your message out to any credible mouthpieces at this point.

If, in a couple of years, everything is still fine, then I may relent and get the jab. But right now there is just no way to trust it without trusting institutions which have proven themselves liars.

I'd like to disagree, but I can't. What I can say is:

1) I know enough about molecular biology to tell you the vaccine is safe. You pick up novel stuff all the time. In abstract, we don't know a pebble in your backyard doesn't have some odd chemical which will end humanity, but the odds of that are astronomically low. There just isn't any voodoo in the vaccine.

2) In this case, the claims from "alternative news" are nonsense. With hundreds of millions of doses of vaccine administered, there will be instances of virtually everything happening after the vaccine. That's not to say they're always nonsense -- I read a variety of media -- but in this case, they are.

3) Doctors who fear vaccines are crackpots.

4) You're absolutely right about institutions lying. You're not only right about researchers not being able to get a message out contradicting the party line, but worse, their career would be destroyed. It's the story of the boy who cried wolf.