One Constant
Even so, there is one aspect that has been consistent in both administrations: career health officials at agencies like CDC, FDA, and the National Institutes of Health.
The top roles, such as the CDC Director and FDA Commissioner, are always reserved for political appointments. But the vast majority of staff, scientists, and officials that are working at federal agencies keep staying even when the administrations change.
An example of the mentioned continuity is how the CDC kept on publishing its Morbidity and Mortality Weekly Reports (MMWRs), where you could see highlights of the pandemic-related studies and updates for the public on new scientific developments.