John Ruwitch

The race for a coronavirus vaccine is on.

This week, Massachusetts-based Moderna Inc. reported promising preliminary results for the vaccine it is developing. It's one of eight vaccines under development that have been approved for clinical trials, according to the World Health Organization.

Updated at 9:41 p.m. ET

Secretary of State Mike Pompeo on Monday blasted the head of the World Health Organization for bowing to Chinese pressure and not inviting Taiwan to attend the body's annual meeting, damaging its credibility at a crucial time.

The World Health Assembly started on Monday amid the worst pandemic in modern history.

Taiwan's handling of COVID-19 has won plaudits around the world, creating a historic public relations opportunity for the diplomatically isolated island.

Whether that leads to a higher profile on the international stage or a flare-up in tensions with Beijing — which regards Taiwan as Chinese territory — will depend on how the two sides play their cards at this pivotal moment, experts say.

China on Tuesday reported no deaths from COVID-19 for the first time since it began publishing data about the outbreak more than two months ago.

The milestone comes a day before the government is set to lift outbound travel restrictions on people in Wuhan, the country's hardest-hit city.

With a population of more than 10 million people, Wuhan has been under lockdown since Jan. 23 in a bid to stop the spread of COVID-19. The first cases of infection with the coronavirus were detected in Wuhan in December.

The traffic jams of Los Angeles are legendary, with cars often inching along for miles, bumper to bumper.

But you can add LA gridlock to the long list of things that the coronavirus pandemic has changed.

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MICHEL MARTIN, HOST:

Updated at 3:45 p.m.

China will close its borders to foreigners starting on Saturday, March 28, in a dramatic step to try to stop the coronavirus coming in from abroad.

The move is the latest in a string of tough steps by the Chinese government to combat the virus, which first appeared in the city of Wuhan late last year and has spread widely since.

Now that China appears to have snuffed out local transmission of the coronavirus, it is trying hard to keep the disease from rebounding back in from abroad. China has reported just a handful of new domestic COVID-19 cases in recent days, but has seen a spike in cases coming in from elsewhere.

As thousands of travelers have begun entering China in anticipation of the eventual return to normalcy, the government has put in place a strict regime of health checks, monitoring and quarantine in the hope that it can catch any new inbound cases before infections can spread.