The deaths, reported by the vaccine injury tracking system for the U.S. Centers for Disease Control, mostly occurred within 48 hours of the vaccine being administered

February 1, 2021 (LifeSiteNews) – At least 273 people have died after being vaccinated for COVID-19 as of January 22, according to U.S. government data released on Friday. The deaths were reported to VAERS, the vaccine injury tracking system for the U.S. Centers for Disease Control (CDC).
A total of 9,845 adverse events possibly linked to the COVID-19 vaccines made by Pfizer and Moderna have been recorded by VAERS so far, although the actual number of cases is likely far higher.
VAERS, a voluntary surveillance system, picks up only around 1% of vaccine injuries, a 2010 report by Harvard researchers found.