According to the figures published on Sunday by the Iranian Health Ministry, 2,299 people have tested positive for coronavirus over the past 24 hours, up from 1,382 a day earlier.
Covid-19 also claimed the lives of 50 people during the same period, down from 54 a day earlier, the figures showed.
Since early 2020, 7,151,088 people have been diagnosed with Covid-19, while 140,021 have been killed by the fast-spreading virus.
The rise in infection cases come as Iranians have been marking New Year holidays with family visits and inter-city trips since last Sunday, amid sharply loosened pandemic restrictions.
The country’s officials attribute the decreasing death toll to a widespread vaccination campaign countrywide.
The new figures said 146,302,121 doses of vaccine have so far been administered, including 25,845,904 third booster shots.