I don't know if DeSantis is or not, but I am because it's the most obvious and likely cause. To date something like 1.1 to 1.2 million illegals have been admitted into the US by the Biden administration. Of those somewhere between 6% and 30% have active Chinese Disease. That means Biden has put somewhere between 60,000 and 360,000 active Chinese Disease cases into the US and spread them across the nation in ways that would virtually ensure that they gave others the disease. If that were a 1 to 1 ratio then between 120,000 and 720,000 cases are directly due to illegal immigration.
That means the single most important, and largest, factor in this new resurgence of Chinese Disease is Biden's open borders policy and letting over a million illegal immigrants into the US. That makes this spread of Chinese Disease Biden's and Biden's alone since his administration and himself have repeatedly said immigration is a federal responsibility of the administration and nobody else's.