As the European Union unveils a massive recovery plan for member states the World Health Organization (WHO) says the Americas is now the epicentre of the coronavirus pandemic.

The European Union has proposed a 750 billion euro (A$1.2 trillion) recovery fund to help combat the economic fallout from the coronavirus pandemic in Europe.

Dr Carissa Etienne, also head of the Pan American Health Organization, said "now is not the time for countries to ease restrictions".

The Health Ministry reported 151,767 cases on Wednesday, a jump of 6387, with 4337 deaths — an increase of 170 in the past 24 hours.

The country's top infectious disease expert said South Korea may need to reimpose social distancing restrictions because it's becoming increasingly difficult for health workers to track the spread of COVID-19 amid warmer weather and eased attitudes on distancing.

President Vladimir Putin said Moscow, the epicentre of Russia's coronavirus outbreak, had succeeded in preventing what he called the worst-case scenario as the city looked to easing tough lockdown measures within days.

Mr Putin said it was now time for Moscow to provide medical help to a handful of regions where the coronavirus remained rampant.

The number of coronavirus cases in Moscow has halved.

The British Government is working with businesses to help them prepare for the departure from the European Union even as it helps them cope with the coronavirus pandemic, cabinet office minister Michael Gove said on Wednesday.

The moves by three of the countries hardest hit by coronavirus infections and deaths follow a World Health Organization (WHO) decision to pause a large trial of hydroxychloroquine due to safety concerns.