"Delays and setbacks are built into the scientific process no matter where it occurs, but researchers in Iran face an additional burden imposed, largely, by politics. Cell biologists lack even the machines that sort cells by surface-protein markers because the necessary US-made equipment cannot be imported. They cannot perform many experiments that we consider routine, but rely on collaborators who have the necessary equipment. Even when equipment has been procured, Iranian researchers face logistics that prevent them from getting on with their experiments.
It seems to me that these restrictions are not in anyone's interest. Scientists themselves exacerbate the situation, fuelled by misinformation that they put themselves at personal risk by travelling to Iran. Of course, people who would not be able to refrain from political discussion or dress as expected would be wise not to go. But the vast majority of scientists would find themselves surrounded, as I was, by courteous, hospitable, well-informed men and women who relish interaction with other scientists. Unfounded apprehensions about the risks of travelling to Iran effectively add a scientific embargo to the politcal one.
I think it's commendable that Jaenisch has the guts to take positions that powerful people in his country might disagree with, rather than bury his head in the sand alongside many of his colleagues.