> You may be comparing fatal-only vaccine blood clots to non-fatal contraception blood clots At the time vaccination was paused, here were 6 known cases of CVS

> You may be comparing fatal-only vaccine blood clots to non-fatal contraception blood clots At the time vaccination was paused, here were 6 known cases of CVST, 2 fatal, in 6.8 million vaccinated. To come up with 1 in 250,000 like the OP, you need to consider only women (~3.5 million doses), count all cases (not just the fatalities), and assume more than half of the cases were not reported.