I know people getting a positive via rapid antigen at Ezeiza after getting a negative with PCR in USA. So, if you get a positive, you are sent to a hotel inn microcentro..and then you do a PCR test. The result is announced in 3-4 working days. If its positive, you stay in hotel, till they determine if its the new strain of the virus..which takes another 3-4 work days. If its the common strain, you get to do remaining time at your home. If its the new strain, you stay at this hotel till you are full cured.