My understanding is that Argentines and permanent residents with DNIs do not have to present ANY Covid test when returning to Argentina however an Argentine friend reports nearly missing his flight in Miami because the agent demanded a PCR test. The friend had done the rapid test thinking that that was required when it seems NONE is required. In the end he persuaded the airline employee to let him board. It seems that airline personnel are poorly informed. I don't know how to avoid this other than doing an expensive PCR test. Any thoughts?