NEW DELHI: India’s devastating Covid-19 surge further accelerated on Saturday with more than 400,000 new cases in 24 hours, as vaccinations opened to all adults despite shortages of shots.

The hard-hit capital New Delhi meanwhile extended its shutdown for another week while top US pandemic advisor Anthony Fauci said that India should go into a national lockdown for “a few weeks”.

Two months ago the health minister said India was in the “end game” of the pandemic as it sent millions of vaccines abroad, but now exports have stopped and people are desperate to be inoculated.

A crowd of people formed outside one Delhi hospital on Saturday — one of very few offering shots to those under 45 years old.

Until now, only “frontline” workers like medical staff, people over 45 and those with pre-existing illnesses have been given the AstraZeneca or Covaxin shots.

But even this more modest programme has stumbled, with some areas running out of jabs and others throwing them away because of lack of demand, in part because some people are scared to leave home during this recent surge.

So far, around 150 million shots have been administered, equating to 11.5 percent of the population of 1.3 billion people. Just 25 million have had two doses.

With the expansion of the rollout to all adults, around 600 million more people are now eligible to get vaccinated, but many states said they have insufficient stocks.

Millions of younger people terrified by the current situation and desperate to get inoculated registered on the government’s digital platform.

But very few of them have been given appointments and only around half a dozen of India’s 28 states began vaccinating people under 45, and in many cases only a token scale.

Fauci said in an interview with the Indian Express published Saturday that India was “in a very difficult and desperate situation” and that it “absolutely (has) to get more people vaccinated”.

Prime Minister Narendra Modi’s government has resisted imposing a national shutdown lockdown but many states have imposed heavy restrictions.

Russia on Saturday became the latest country to send aid, with the first shipment of 150,000 Sputnik V vaccines arriving by aircraft.

Indian firms also have deals to produce millions of doses of other vaccines including Sputnik V and Johnson & Johnson’s single-dose vaccine, but it could be months until these are deployed.