[angelzen]

"We've measured the position of iron balls thrown at different speeds from a 56m tall tower and found they were 90% likely to be found flying in the air."

This is technically correct, yet fundamentally misleading. The same statement, bracketed by time since triggering event:

"We've measured the position of iron balls thrown at different speeds from a 56m tall tower, 0.1 seconds after throwing, and found they were 90% likely to be found flying in the air."

Even better, show the plot of position by time, or at least clarify you are merely doing a point-in-time measurement. Time is a fundamental component of the vaccine effectiveness equation.