Why did I feel good and calm after getting a vaccine and antibiotics?
I got an infection and had to get a vaccine and antibiotics to treat it. A bit after I got the vaccine and took the first dose of the antibiotic, I felt kind of happy and calm, like my body produced neurochemicals that made me feel this way. I'm wondering what's the explanation for this? Does it have to do with my immune system? I am diagnosed with depression by the way.