Omg. I just had quite an experience at the CVS pharmacy. An older lady, probably around my mom's age (74) she there to recieve her seasonal shots. As I was standing in the checkout line I heard the pharmacist say this one is your pneumococcal shot, this one is your influenza shot, and this one is your covid shot. After the pharmacist injected the 3rd shot she began having tremors (not seizures) and fell out of her seat, smacked her head on the floor. I get out of line and down on the floor while they were calling EMS. HOLY SHIT. She wasn't breathing, but had a strong pulse around 86. I've always made it a habit to carry a pocket face mask with me, I asked a guy in line to get on the floor and directed him how to hold c spine correctly. I gave rescue breaths until the Paramedics arrived (I know the whole crew) as they are putting the bvm together, I'm still giving rescue breaths. They have her hooked up to the cardiac monitor. Heart rate and 12 lead are unremarkable, , they opted to intubate her before transfering her to the gurney, while another medic started an IV. They left CVS 10-18 (emergency traffic) I just recieved a call that this 6 echo call (not breathing) turned into a 9 echo (full cardiac arrest) I'm praying they get her back🙏🏻