One on my major takeaways from the calls was how many people were visibly sick yet still working and getting on calls. WFH has really destroyed the concept of stay home and get some rest.
That said, I've definitely called in to things while sick because I didn't have anything better to do. Watching TV all day wasn't going to make me get healthier faster than watching a business presentation, and as long as my team understood that I was a little out of it, the normalcy of being "at work" helped me not just feel lazy and terrible.
I preach ”don’t be a martyr” to anyone and everyone that listens, especially when I’m on a call and they mention they are not feeling well. Sure - there are meetings and engagements you really don’t want to miss (stuff like the boss’s boss will be on the call) but as long as you are not calling in sick all the time, no one cares! They usually say “oh shit I hope they feel better” and stop thinking about you.