For me it's been both about setting boundaries and figuring my own limits: There are stuff I can't help with. As it is OK to sometimes say "Sorry, I'm just too tired to proofread that for you ATM", it is also OK to stay away from people fighting each other when I just know how much it eats my soul.
There were times I thought I'm, by nature, uncapable of empathy - mostly because of being targeted with narcissistic gaslighting and brainwashing. Stuff you just believe in when a skilled enough manipulator rubs that into your face long enough, seasoned with a handful of lies, you know how it goes. Combined with survival insticts such as fight or flee, it really sinks in to the victim and the abuser knows it.
When I was taught the no contact strategy, and supported in it by some trusted ones, I got more space around myself, and learned it's not being uncapable of empathy but rather being consumed by the feelings of others and feeling overwhelmed by it. Which was... a strange feeling, and not easy to believe, but also very common among people who get abused, I heard. And that is no one's fault, just a thing that is useful to know about oneself.
Digging it further, with a professional, I realized that in order to feel good and to really help those I care about, I have to let go of issues that belong to faceless Internet brawlers, so I'd still have energy left where I can really make a difference. Okay, now this is related to nothing anymore, I'll stop here, sorry
Anyhow, just saying that a break from social media hate culture can be... refreshing. In multiple ways, whether the topic is vaccines or not.