The supervisor of the Coviran Barekat Covid-19 vaccine research team, Dr. Monoo Mohraz, sits prior to receiving the vaccine during the third phase of the clinical trial of the Iranian developed vaccine, during a staged event at the Eram Grand Hotel in Tehran, Iran, Sunday, April 25, 2021. Shifa Pharmed is in the last stage of their vaccine study, while the country has been hardest-hit by the coronavirus in the Middle East. (AP Photo/Vahid Salemi)