Client received his 1st Pfizer vaccination (Lot# EW0187, EXP 08/31/21) in his left arm at 19:15 from RN.  Client?s parents and sister were with him.  Client?s parents only spoke Spanish and an interpreter was present.  After receiving his shot, client sat in a chair next to his sister while RN administered a shot to her.  Five minutes later client stated he felt nauseous.  RN immediately called out to Vaccine Runner RN and Check-in Nurse who were in the hallway to get an EMT.  Check-in Nurse radioed for an EMT to come to station 3 while Vaccine Runner RN rushed to the EMT room to ensure an EMT got the call.  Check-in Nurse stayed with the client and placed a trash can next to him in case he vomited.  RN stated the client looked pale and clammy.  At 19:26 EMT1 arrived at station 3 and collected the client?s medical history.  Interpreter was also translating the EMT?s questions and statements to the client?s parents.  Client stated he had no known allergies, no underlying conditions, and is not currently taking any medications.  Client also stated he was not experiencing shortness of breath, chest pain, or having trouble breathing.  EMT2 arrived at station 3 at 19:27 and brought the client a vomit bag.  The client had not vomited, but still felt nauseous.  EMT1 gave the client a bottle of water and juice,  and took client?s vitals at 19:28 (HR:  64, BP:  120/70).  Client stated he felt a lot better.  While walking out of station 5 Lead RN saw individuals grouped together at station 3 with the EMT and arrived at station 3 at 19:28. Lead RN was updated on client?s status.  Lead RN observed that the client was mildly pale and clammy and asked client?s mother if his current coloring was normal for the client.  Interpreter translated to both parents and client?s mother stated that the client did look a little pale.  Client stated he felt better and was just nervous about getting the shot.  At 19:30 Lead RN asked client to try and stand up. Once client was standing, Lead RN asked client if he felt dizzy and client stated no.  Client stated he felt just fine.  Lead RN and EMT?s directed the client to the observation room to sit in a zero-gravity chair for additional monitoring of 30 minutes.  EMTs walked the client and his family to the observation room and sat him in the zero-gravity chair.  Client stated he felt much better and at 19:47 EMT1 took client?s vitals (HR:  66, BP:  100/70, SpO2:  98).  EMT1 stated client?s color was returning.  EMT1 took client?s vitals again at 20:04 (HR:  67, BP:  104/78, SpO2:  99).  Lead RN arrived in observation room at 20:10 with Lead Ancillary to check on client who stood up and stated he felt good.  Lead RN observed that client was no longer pale or clammy.  Lead RN educated parents and client on potential side effects vs adverse effects of the vaccine.  Lead RN further instructed client and parents to see the client?s HCP or visit urgent care if client started to experience additional common side effects for more than 24-48 hours and to call 911 if the client began to experience trouble breathing, shortness of breath, or chest pain.  Lead Ancillary translated all the information to the client in Spanish.  Lead RN observed the client leaving with his family at 20:15. Client left walking with a steady gate.