Everything is Trump's fault.
Accurate. DT has been reducing the budget and firing workers at the FDA and the CDC, which is to say, the medical professionals charged with stopping disease,.
Democrats will fix it in a few weeks
Unlikely. Even if Democrats win control of the House of Representatives, DT is still the president and hence the chief executive. The Democrats don't have the power to fix anything, the best they might be able to do is to stop things from getting worse quite as quickly.
Possibly they could get rid of RFK Jr, who seems to be actively trying to destroy medical science in the US, but DT would just find another incompetent to replace him, and if the Senate won't ratify, he has no problem just keeping an "acting" head forever.
We just need infinity immigrants. That solves everything.
Not sure how you can have "infinity" immigrants, but, yes, we could bring in doctors, nurses, and medical researchers from abroad.