Yes. I did a test last year to check for antibodies generated through the vaccine and antibodies generated through an infection.
Vaccine was positive, infection negative.
"If all you have is a hammer, everything looks like a nail."
Frontend frameworks like React are used everywhere. For real web applications like Facebook, they totally make sense. But for a lot of other projects, they don't because those projects do not have a complex UI/UX and so the framework adds more complexity than needed.
In germany, the Telekom (T-Online) used to block http or SMTP traffic when they recognized an infected connection which sent SPAM emails. Don't know if they still act like this.
Or when you were on vacation taking a brake from work and so also from the tech stuff. RSS is great for not missing something. All that interest based sorting for social media made RSS much more important for me.
Happy for any feedback.