Iran warned Sunday of a resurgence of the novel coronavirus as it reported 51 new deaths, almost a month after it started to relax a nationwide lockdown. Authorities reimposed more stringent measures in the southwestern Khuzestan province, reversing a phased return to work meant to revitalise the battered economy. “The situation should in no way be considered normal” in Iran, health ministry spokesman Kianoush Jahanpour said in televised remarks.