[zozbot234]

It wasn't even a bad reaction. He says he felt quite sick for a few days, which is expected since the whole point of a vaccine is to promote an immune response and that's also the part that makes you feel sick when you catch a real infectious disease. Sensible people will know this of course, and it's clearly stated by reliable sources. Is Musk just trolling at this point? That whole tweet reads like trolling.

(He also mention a relative who had an actual side effect of concern, namely myocarditis. That looks more legit at first glance, but guess what's a common side effect of COVID19 itself? That's right. The balance of benefits vs. risks is overwelmingly on the side of vaccine, at least if COVID19 remains endemic as it's expected to.)