This week New York will enter phase one of the state's plan to reboot economic activities shuttered due to COVID-19, which caused more than 21,000 confirmed and probable deaths in America's most populous city.
The United States on Thursday also passed a total of more than 4 million coronavirus infections since the first US case was documented in January, according to a Reuters tally, reflecting a nationwide escalation of the pandemic.
In Texas, another hot zone, Governor Greg Abbott warned on Friday he may have to impose new clampdowns if the state cannot stem its record-setting caseloads and hospitalisations through masks and social distancing.
More than 138,000 Americans have died from COVID-19, a toll that experts warn will likely surge following recent record spikes in case numbers and an alarming rise in hospitalizations in many states.
India on Friday became the third country in the world to record one million coronavirus cases, following Brazil and the United States where infections also continued to surge.
The US president, once mocked for asserting that California's devastating wildfires may be caused by a lack of "raking" the forest floors, on Monday waded again into the debate over the wildfires ravaging swathes of the western US.
Pfizer Chairman and CEO Albert Bourla called the development "a great day for science and humanity." Health experts said Pfizer's results show vaccines can halt pandemic.
The beginning of vaccinations could be a crucial shift in the battle against a virus that has claimed more than 1.4 million lives worldwide, including 255,000 just in the US, since emerging from China late last year.
Preliminary projections make the availability of one or several vaccines seem possible by autumn 2020," the Robert Koch Institute said in a statement on its website, citing a global effort to bring immunisations to market.
In a video on Twitter Anez said she was "fine" and would continue working from isolation. Bolsonaro said he was feeling "very well" on Thursday after announcing he had the virus earlier this week, and Johnson, who contracted the respiratory disease in March, has recovered.