Edit: after I posted this I noticed in the thread somebody already copied and pasted the info.
That number (30) that the OP referenced was an average of the number of people supposedly killed by the vaccine.
Not that I blindly trust everything coming from the government (CDC) but here is the official CDC info for that stat referenced by the original poster of this thread:
Link:
if you're interested in the info scroll down to the 5th subheading that addresses this, titled: