Iran announced on Sunday that it is reimposing coronavirus restrictions on major cities, as the spread of the highly contagious Delta variant spurs fears of another devastating surge in the country.

After more than a year battling the worst virus outbreak in the Middle East, Iran ordered the closures of non-essential businesses in 275 cities, including the capital, Tehran.

The shutdown of all public parks, restaurants, dessert shops, beauty salons, shopping centres and bookstores applies to the country’s “red” and “orange” zones, or municipalities ranked as having an elevated risk of Covid-19.

The government said it is also imposing a travel ban between cities with high infection rates.

Iran’s new restrictions are designed to slow the spread of the highly transmissible Delta variant first detected in India, which President Hassan Rouhani warned on Saturday is driving a potential “fifth wave” of infections in the country.

Reports of new cases have risen steadily in recent weeks, nearly doubling from from mid-June to early July.

The country has reported a total of 3.2 million infections and 84,627 deaths — the highest toll in the region.

The spike comes as Iran’s vaccine rollout lags, with less than 2% of the population of 84 million fully vaccinated, according to online scientific publication Our World In Data.

Iran says it has administered some 6.3 million doses so far. Those have mainly come from abroad, including from Covax, an international initiative meant to distribute vaccines to low- and middle-income countries.

Iran has also imported Chinese state-backed Sinopharm vaccines and Russia’s Sputnik V vaccine.

With foreign vaccines still in short supply, the country has accelerated efforts to develop its own.

Last month, authorities granted emergency use authorisation to the domestically produced CovIran Barekat shot, without publishing data on its safety or efficacy.

Iran’s supreme leader Ayatollah Ali Khamenei, who previously warned against the import of American and British vaccines amid deep-rooted distrust of the West, was given the home-made vaccine on state TV and encouraged the public to follow suit.