One study. Monitoring a single jab.
397 reports of heart inflammation. 14 deaths.
CDC study on the effects of the Pfizer vaccine in 12-17 year olds:
https://www.cdc.gov/mmwr/volumes/70/wr/mm7031e1.htm?s_cid=mm7031e1_w
The CDC’s corresponding author, Anne M. Hause, Ph.D., said:
“Impressions regarding cause of death did not indicate a pattern suggestive of a causal relationship with vaccination; however, cause of death for some decedents is pending receipt of additional information.”