Their mandate changed. They are not the centre for disease control and prevention and they act in accordance with their mandate as a public health agency
I know this is a typo, but it reverses the meaning so clarifying for future readers in case it's confusing:
They are _now_ the centre for disease control and prevention
Yes, I know. I have friends there who are fantastic, smart, committed civil servants working within their mandate and structure. I have a Master's in Public Policy from the Kennedy School, I'm not anti-government. But mission creep has hurt the CDC more than helped the nation. Public health is far too big a remit for any one agency.