I had my second dosis of the BNT162b2 last Monday and the only side effect was some pain in my shoulder, or at least that’s what I thought until I briefly checked my hear rate and I realized that 24 hours after the second dosis it climbed more than 25% lasting 48 hours. My average rest rate is 58-62 and at that time it was more than 85. I thought that maybe something was wrong when my walking heart rate for several minutes was higher than 130 when it should range between 95-105.

Obviously my antibodies were doing its job and everything now it’s back to normal. I did not suffer any other side effects like fever, headache, chest pain or tiredness.