Canada? Germany? Poland? was the sequence Natalia was greeted by a street vendor who was trying to guess which country we were from. We were just across the Mexican border in Nogales and it was a bit surprising that he did not even try US. We decided to take it as a compliment. And we needed the compliment rather badly. Apparently we looked really sick. At least based on the frequency with which random strangers suggested we pay a visit to a pharmacy. Taxi and real Mexican food were also offered regularly but the most frequently we heard an assurance that they had what we were looking for.