The small "Defenders of the Homeland, Helpers of Health" parade, held at a training centre before a group of commanders in face masks, was a far cry from the typical Army Day parades, which normally feature marching infantry, missiles, submarines and armoured vehicles, with warplanes flying overhead.
"Due to health and social protocols, it is not possible to hold a parade of soldiers ... The enemy now is hidden and doctors and nurses are at the frontlines of the battlefield," President Hassan Rouhani said in a message to soldiers, disseminated by state media.
Army chief Major General Abdolrahim Mousavi thanked the more than 11,000 military medical staff who are fighting the coronavirus.
Iran is the Middle East's worst-hit country by the COVID-19 respiratory disease. The official death toll rose to 4,869 on Thursday, and a parliamentary report said the actual number might be almost twice as many.Deputy Health Minister Iraj Harirchi has warned that the infection could spread further in autumn.