You can find fat powerpoints by the companies on the FDA’s website: J&J, Pfizer, Moderna. Each deck includes a Kaplan-Meier survival curve, showing COVID protection by day-after-vaccine. On the J&J deck it’s slide CO-36. The curves for the placebo group and vaccine group get further and further apart as time goes on, with the lines first separating at the 14-day point. I am not sure if this means the vaccinated gain additional protection in week 3, 4, etc., after vaccination, or if it just means that more placebo people get infected as time goes on. What’s interesting with the J&J plot is that the lines don’t visibly separate until day 14 - naively this makes me want to say the vaccine isn’t effective at all till day 14, but biologically that doesn’t make sense to me, so I’m not saying that.