People walk down the Soi Cowboy touristic street after the reopening of bars as restrictions to halt the spread of COVID-19 are eased in Bangkok, Thailand on Wednesday. Photo: AFP

New daily coronavirus cases in the US soared past 50,000 for the first time on Wednesday, as the World Health Organization (WHO) delivered a grave warning that the global pandemic is accelerating.

Restaurants, bars and beaches in the world's worst-hit nation closed from California to Florida, as states reeling from yet another surge in the deadly virus braced for Independence Day festivities.

Global infections have hit their highest level in the past week, WHO data showed, with chief Tedros Adhanom Ghebreyesus saying new cases topped "160,000 on every single day."

The grim milestone came as the European Union left the US, Brazil and Russia off its final list of nations safe enough to allow residents to enter its borders.

With more than 52,000 new COVID-19 cases in the US alone in the past 24 hours, according to a Johns Hopkins University tally, several US states imposed 14-day quarantines on visitors in the buildup to the July 4 long weekend celebrations.

California suspended indoor dining at restaurants in Los Angeles and several counties, while New York scrapped plans to allow restaurants to seat customers inside from next week. 

US President Donald Trump reiterated his belief that the contagion will "at some point... sort of just disappear, I hope."

But the US leader who has yet to be seen in public wearing a face mask during the pandemic added he would have "no problem" doing so.

The rollbacks came as the European Union reopened its borders to visitors from 15 countries.

The bloc hopes relaxing restrictions on countries from Algeria to Uruguay will breathe life into its tourism sector.

However, with over 10 million known infections worldwide and more than 500,000 deaths, the pandemic is "not even close to being over," the WHO warned.

Data provided by the UN health agency for the seven days from June 25 until Wednesday showed the highest number of new daily cases ever recorded came on Sunday, when over 189,500 new cases were registered worldwide.

AFP