I guess it depends on whether the tourists focused just on a few big cities or whether they were all over the countryside.
If (and of course I have no info either way) it was just a few big cities the Iranians could have quarantined the big cities and at least (largely) protected the rest of the country.
That is the approach the Saudis are using right now.
They discovered one city on their east coast was getting a large number of cases from foreign tourists, so they just quarantined the whole city.
Felix Yang
@FYang_EP
@GileadSciences
My physician colleague has worsening coronavirus #COVID19 . Gilead reps said they don't have access to the drug trial on weekends. Please help. Contact me please. Healthy 30 yr old male with sudden, rapidly progressing resp failure. (posted with permission pic of his lung scan).