User blog comment:Dragotheseadragoleviathan/Why does the infect command I've heard of not work?/@comment-30868164-20170124050120/@comment-30868164-20170128014159

First, I need some more information. What are you trying to infect? The player, or a fauna?

If it's fauna, you would have better luck spawning a bunch of them, then killing the healthy ones (or relocating them).

It it's the player, well then switch to survival and give it a few days...you should catch it by then.

If you don't feel like waiting days to be infected, you can change the speed to make it go by faster.

I would suggest "speed 10".