The who is pretty much everyone in government, egged on by the business community with the tacit approval or at least disinterest of the public. The when is constant over the past half century. The how is outsourcing much of our productive capability around the globe. The why is the race to the bottom for the cheapest production cost.
I don't think so. This is not a case like where we need a bunch of steal but the steel mills are closed so we have to buy the Chinese steel so (as any good business-folks will do) they raise prices 8-fold (see Oakland Bay Bridge Fiasco). The reagents for these tests are all made in america, or would take a few days to ramp up. I once made enough Taq polymerase in 12 hours to supply a lab for 12 years doing 200 PCRs a day. A single person can make gram quantities of the required oligos (enough for 100,000 PCR reactions) in any one of 500 labs in the Bay area alone in 12 hours. RT takes an hour. Amplification takes 4 hours. The readout for a sample can be done 1500 at a time in one second. There are no excuses.