For what it's worth - I got bot Pfizer shots. Slept for a couple of hours after the first one. Then was very groggy for a couple of days after the second one. Hardly a big deal. If what's keeping you from joining your dream unit in the army is this vaccination then I think you'll end up regretting it if you choose to pass on it. That's coming from me - and I hated my time in the army. Having said that, it's true that no one knows what the long term side effects of it may be. At least they're not vaccinating the kids, so they can rebuild after we all turn into zombies.