Iran reported on Monday 162 more deaths from the novel coronavirus, the highest single-day toll since the outbreak began in the country in February.

China imposed a strict lockdown on nearly half a million people near the capital to contain a fresh coronavirus outbreak on Sunday, as authorities warned it was soon to "relax" over the new cluster of cases.

The United States has surpassed 2.5 million coronavirus cases, as efforts to reopen the world's economic powerhouse were dramatically set back by a surge of new infections in states such as Florida.

Iran's President Hassan Rouhani said on Sunday that mask-wearing will be mandatory in certain areas as of next week and gave virus-hit provinces the green light to reimpose restrictive measures.

Two of America's largest states have reversed course and clamped down on bars again in the nation's biggest retreat yet as the daily number of confirmed coronavirus infections in the U.S. surged Friday to an all-time high of 45,300.

Texas Gov. Greg Abbott ordered all bars closed, while Florida banned alcohol at such establishments. The two states joined a small but growing number that are either backtracking or putting any further reopening of their economies on hold because of a comeback by the virus, mostly in the country's South and West.

America's top infectious diseases expert has warned the United States is facing a "serious problem" from a resurgent coronavirus as the illness puts the brakes on reopening two of the country's largest states.

India now has more than 500,000 confirmed coronavirus cases, according to government figures released Saturday that showed a record daily leap of 18,500 new infections.

While China moved closer to containing a fresh outbreak in Beijing, the coronavirus took a stronger hold elsewhere, including the United States, where surging infections across southern states have highlighted the risks of reopening economies without effective treatment or vaccines.

Another record daily increase in India on Friday pushed the country's caseload toward half a million, and other countries with large populations like Indonesia, Pakistan and Mexico grappled with large caseloads and strained health care systems.

Health workers fanned out across suburbs of Melbourne Friday in a testing blitz aimed at choking off a surge in coronavirus cases in Australia's second-biggest city.

The White House said Thursday President Donald Trump will travel to New Jersey this weekend as planned even though it is one of three states recommending that people who have been to coronavirus hot spots self-quarantine for two weeks.