It is true that as of April 4th, the CDC's website will not be posting updated flu season burden estimates, but that isn't because there's some kind of a cover-up. It's because flu season is mostly over, and any updates would be kind of irrelevant. States are continuing to collect their data, which will be used to update and revise the CDC's numbers after the fact, but given that flu season has crested, the CDC's role in this has ended for now.