According to country’s Health Ministry, a daily record high of 13,961 new coronavirus cases was registered throughout the country from Wednesday to Thursday pushing the national tally to 908,346, IRNA reported.
The Health Ministry’s Spokeswoman Sima Sadat Lari said at her daily briefing that 633,275 people out of a total of 908,346 people infected with the deadly virus have recovered and been discharged from hospital.
She added out of the 13,961 new infected cases, 2,439 patients have been hospitalized, over the past 24 hours.
Another 5,849 COVID-19 patients are in critical condition or being treated in intensive care units, Lari said.
She noted that 5,955,724 tests have so far been carried out in Iran.
Iran classified 27 of its 31 provinces as “red zones”, the highest category in the country's virus risk scaling.
Iran's health officials have urged the nation to adhere to the health protocols, including wearing face masks and observing social distancing.
On Saturday, Iran introduced tougher restrictions for two weeks to stem a third wave of coronavirus infections, including closing nonessential businesses and travel curbs.
The country has also been working on development of a vaccine for the deadly virus.
President Hassan Rouhani said on Tuesday that Iran plans to use foreign coronavirus vaccines while also developing its own.
Earlier on Thursday, Lari was quoted by Russia’s News Agency, RIA-Novosti, as saying in an interview that Tehran and Moscow are to cooperate on COVID-19 vaccine development.
She added that the Iranian experts will cooperate with the Russian vaccine producers based on an invitation made by the Russian side.
The Russian side has invited Iran to hold specialized talks on the issue, she quoted by RIA-Novosti.
Elaborating on Iran's research on the COVID-19 vaccine, Lari said the Iranian companies will start the human trial of the vaccine in a near future.
The Iranian companies have given due information about the process of their activities to the World Health Organization (WHO), she added.
In a related developments, Iran's Ambassador to Moscow Kazem Jalali said that Iran is determined to cooperate with Russia in COVID-19 vaccine development.
Recently, Russia has approved its access to vaccine against the COVID-19.
The deadly virus has killed over 1,400,000 worldwide since its outbreak in December 2019.