From the Guardian:
Iran’s supreme leader, Ayatollah Ali Khamenei, said the US was responsible for sending coronavirus to Iran, therefore making it impossible to accept any American help to fight the virus there. Speaking on the occasion of the New Year and Eid al-Mab’ath, the 80-year-old said “you Americans are accused of engineering coronavirus”, adding: “I do not know how true this claim is, but as long as the accusation stands, which sensible person would trust you to accept your offer of help. Possibly your (offered) medicine is a way to spread the virus more,” he said. “Or if you send therapists and doctors, maybe so they want to see the effect of the poison in Iranian society, so they can complete their information. It is said that part of the virus was produced against the Iranian people.”
His tone contradicted that of the Iranian president, Hassan Rouhani, who had the day before sent a heartfelt plea to the American public to set aside their differences with Iran and work together to fight the virus, including by the US suspending economic sanctions on Iran.