A bunch of people die after the vaccine. Unrelated causes, news says. Investigate, keep dying from the same thing. Public announcement: only 6 have died from vaccine so very safe. You can die from a gunshot, you died from covid, the vaccine shoots a bullet in you, unrelated causes.
500k dead requires much more infrastructure to uphold the deception than 2 weeks to slow the cure, and no one period wants to mention that the vaccine killing the weak also weaks the strong.