"Self-censorship" is not the issue here;
I mean, it sort of is.
The CDC figured out that there are trigger words and phrases that get Republicans up in arms. They want to accomplish the same public health goals they always have, and not get pilloried for it by the people who have the ability to pull their funding. In order to do that, they had to self-censor, which is an insidious evil, and hard to counteract.