The country whose army is most relied on advanced electronic system is most fragile to such weapons
Sadly though medical equipment and hospitals from my knowledge tend to not be as well protected against sich devices. I would also wonder that the effects upon pacemakers would not bode well either.
Still it will be less life impacting than alternatives in the situations which it lends itself towards. So good on boing for finaly making the EMP miltary grade market justified after all these years.