I’ve tried all of them. None of them are as robust or deep as Tasker.

IFTTT is the gateway drug to Tasker. It gets you started, but pretty soon you need a lot more.

Common sense measures are more important than getting a shot. If anything, from what I’ve seen, seems like those who get the shot think they are completely immune so they are more careless and end up being the ones who do initially get the flu.