severe cardiac and neurological adverse event (AE); severe cardiac and neurological adverse event (AE); This is a spontaneous report received from a contactable reporter(s) (Other HCP) from medical information team.  A child female patient received bnt162b2 (COMIRNATY) (Batch/Lot number: unknown) as dose number unknown, single for covid-19 immunisation. The patient's relevant medical history and concomitant medications were not reported. The following information was reported: CARDIAC DISORDER (non-serious), NERVOUS SYSTEM DISORDER (non-serious), outcome "unknown" and all described as "severe cardiac and neurological adverse event (AE)".  Additional information: The nurse wanted to know where she can be able to get the FDA approved COMIRNATY vaccine. The nurse said that she like the one that is FDA approved not the one that is an emergency use. The nurse stated, "I've sent 7 children home with severe cardiac and neurological adverse event (AE), some have gone to the hospital with cardiac with myocarditis diagnosis and PVC (premature ventricular contraction 6 years old) some of them are experiencing crushing chest pain, bilateral arm and finger numbness, bilateral leg numbness, one girl yesterday was suffering from all over body shakes, incontrollable that she can't control, what I was seeing over the past week; first child I sent home, right sidedness weakness, numbing and tingling in her arms and legs and she couldn't feel the right side of her face or her tongue with crushing stomach pain, other child that I sent couldn't feel both of her arms and fingers and terrible stomach pain, child that was sent to hospital on Saturday, crushing chest pain, diagnosed with myocarditis and PVC, child yesterday, had uncontrollable body shake and couldn't stop them sent to the doctor, today was a crushing chest pain, bilateral weakness of the hands and arms weakness on the legs and extreme exhaustion, hemiparesis on the right side she couldn't feel the entire side of her body including tongue her face and her nose." The nurse said that this happened in just one tiny school, all females age from 6-10. The nurse further stated, "also I know the ingredients for the children vaccine are a little bit different there is tromethamine in the pediatric doses I was wondering why that was added in because I've given that to my cardiac arrest patients at hospital after they crashed, we give that as metabolic acidosis reducer so that they will not have another heart attack. We don't used it as a buffer in the hospital on our patient we used it as an ingredient to stop cardiac arrest from happening again it's a metabolic acidosis reducer we give it in the ICU to patients that are coding that a very toxic chemical to be putting in a children pediatric medication it's not used as a buffer i know that for a fact because I've given it personally myself to dead patients that we are trying to bring back to life." The nurse also asked if there is a different ingredient within the FDA approved and emergency use. The nurse is wondering why tromethamine is added to pediatric doses. The nurse further added, "Pfizer using a false information and saying it is added as a buffer so they can cover rear ends because of all these kids getting these horrific side effects, there's many other buffer to be added cause why not added it to the adult one". The nurse also wanted to know if the pediatric doses have seen some severe side effects in 5-11 age group already and asked if these are typical side effects of the Pfizer COVID-19 vaccine (pediatric).  No follow-up attempts are possible; information about lot/batch number cannot be obtained. No further information is expected.; Sender's Comments: Linked Report(s) : US-PFIZER INC-202101626263 same reporter, event, product; different patients