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Approximately 6,000 Carnival cruise ship travelers have been released after a passenger from Macau experienced possible coronavirus symptoms but tested negative, the BBC reports.

The state of play: Officials feared the ship would be the first impacted by the coronavirus spread. Diseases can quickly flourish among cruise ship passengers because so many people are in such close proximity to each other.

U.S. warned to prepare for worst on coronavirus

Thousands released from Carnival cruise ship after coronavirus scare

A passenger from Macau has tested negative for coronavirus.

The Costa Smeralda cruise ship is docked in Italy

The Carnival Costa Smeralda cruise ship docked in Italy. Photo: Filippo Monteforte/AFP via Getty Images 

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Approximately 6,000 Carnival cruise ship travelers have been released after a passenger from Macau experienced possible coronavirus symptoms but tested negative, <a class="gtmContentClick" data-vars-link-text="the BBC reports" data-vars-click-url="https://www.bbc.com/news/world-asia-china-51314138" data-vars-content-id="83afc020-e3a0-4c19-93d3-16a7d937342c" data-vars-headline="Thousands released from Carnival cruise ship after coronavirus scare" data-vars-event-category="story" data-vars-sub-category="story" data-vars-item="in_content_link" href="https://www.bbc.com/news/world-asia-china-51314138" target="_blank">the BBC reports</a>.The state of play: Officials feared the ship would be the first impacted by the coronavirus spread. Diseases can quickly flourish among cruise ship passengers because so many people are in such close proximity to each other.Go deeper: <ul><li><a class="gtmContentClick" data-vars-link-text="What&#x27;s happening with the coronavirus" data-vars-click-url="https://www.axios.com/coronavirus-latest-developments-8b8990c4-6762-494a-8ee0-5091746bda9b.html" data-vars-content-id="83afc020-e3a0-4c19-93d3-16a7d937342c" data-vars-headline="Thousands released from Carnival cruise ship after coronavirus scare" data-vars-event-category="story" data-vars-sub-category="story" data-vars-item="in_content_link" href="https://www.axios.com/coronavirus-latest-developments-8b8990c4-6762-494a-8ee0-5091746bda9b.html" target="_self">What&#x27;s happening with the coronavirus</a></li><li><a class="gtmContentClick" data-vars-link-text="U.S. warned to prepare for worst on coronavirus" data-vars-click-url="https://www.axios.com/coronavirus-china-us-experts-spread-preparation-6997e54b-b3b5-4999-a0b7-5bd0a881e647.html" data-vars-content-id="83afc020-e3a0-4c19-93d3-16a7d937342c" data-vars-headline="Thousands released from Carnival cruise ship after coronavirus scare" data-vars-event-category="story" data-vars-sub-category="story" data-vars-item="in_content_link" href="https://www.axios.com/coronavirus-china-us-experts-spread-preparation-6997e54b-b3b5-4999-a0b7-5bd0a881e647.html" target="_self">U.S. warned to prepare for worst on coronavirus</a></li></ul>

The U.S. faces a range of health care flashpoints — unaffordable drugs, opioids, vaping — as we debate whether to adopt universal care. For now, the Affordable Care Act is the law of the land, but Republicans want to issue it a final death blow.

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China is becoming the most formidable rival America has faced, and the risk of confrontation with Russia, North Korea or Iran still looms. Authoritarians are rising, the chaotic Afghanistan exit revealed the limits of U.S. power, and the pandemic, climate change and other critical challenges continue to pose grave threats.