What you need to know about coronavirus on Sunday, May 17

FILE - In this May 8, 2020, file photo, a team of medical workers wearing respirators and protective gear ready to enter the room of a patient in the COVID-19 Intensive Care Unit at Harborview Medical Center, in Seattle. The number of deaths in Washington because of the coronavirus has reached 1,000, the Washington State Department of Health reported Saturday, May 16, 2020. The agency added eight more deaths and listed the total number of confirmed cases at 18,288. (AP Photo/Elaine Thompson, File) (Elaine Thompson, Copyright 2020 The Associated Press. All rights reserved)

(CNN) -- With the virus largely contained in China, life is slowly returning to normal there. Lockdowns have eased while some schools and factories have reopened.

But the country's top medical adviser, Dr. Zhong Nanshan, tells CNN that a potential second wave of Covid-19 infections remains a "big challenge." That's because we don't know whether people develop immunity to the virus after contracting it.

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There have been worrying signs. Most recently, eight sailors from the aircraft carrier USS Theodore Roosevelt tested positive for the virus a second time.

Zhong also confirmed that local authorities in Wuhan, where the coronavirus was first reported in December, suppressed key details about the magnitude of the initial outbreak. "At the very beginning they kept silent, and then I said probably we have (a larger) number of people being infected," he said.

Fresh clusters of cases have emerged across China recently. On Friday more than 8,000 people were quarantined in and around Shulan, in the northeastern province of Jilin.

Fears of a potential second wave have also rattled South Korea, where confirmed cases believed to be linked to Seoul's nightclub cluster rose to 168 today.

Many from the country's LGBTQ community, which still faces discrimination in South Korea, frequent the nightclubs. And fears of having their sexuality outed have kept some patrons who were potentially exposed from coming forward.

As global leaders weigh the risk of second waves of infections with the need to reopen their economies, people are increasingly losing patience. Protests against lockdown measures spread this weekend in the United States, Germany and the United Kingdom.

WHAT’S IMPORTANT TODAY

Coronavirus spreads across Russia

Russia has the world's second-highest number of confirmed coronavirus cases after the United States. Moscow has been hardest hit, with more than half of the country's roughly 281,000 cases.

But the virus is spreading across the country, a landmass that covers 11 time zones and includes remote and impoverished places. Nathan Hodge reports on Russia's inequalities and its decrepit healthcare system.

The generational divide

"I feel like my generation has just received no breaks," said Rachel Friend, a 30-year-old Florida mom of two. "When I graduated high school in 2008, it was a recession. Now, here I am, I just started a family, and I'm basically in another recession."

While older generations endure higher physical risks from the coronavirus, it's younger Americans who will likely suffer the economic fallout.

Millennials face another once-in-a-generation economic disaster and Generation Z will likely experience a decline in their long-term pay and job prospects.

US relies on India for generic drugs but China controls supply chain

Generic drugs in the US represent 90% of all prescriptions. And one in every three pills is produced by an Indian generic drug manufacturer.

But India gets around 68% of its raw materials -- active pharmaceutical ingredients -- from China. Any disruption in that supply chain can create a major problem, especially during a pandemic, Priyali Sur reports.

New York City's Rikers Island jails: 'The epicenter of the epicenter'

As coronavirus cases began spiking in New York City in March, officials worried that the city's jail system on Rikers Island would become a powder keg inside the US epicenter of the pandemic.

In the weeks that followed, correctional officials handed out masks. They increased cleaning and released more than 2,600 inmates.

Despite these efforts, Sonia Moghe reports, 363 inmates and more than 1,300 Department of Corrections workers have contracted the virus. Three inmates and 10 corrections officers have died.

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How to keep your preschoolers learning (while staying sane)

Homeschooling during the Covid-19 crisis, particularly with younger children, has generated anxiety, conflict and resentment among parents who need to be calm, sensitive and emotionally available to their children during this difficult time, says Erica Komisar, a licensed clinical social worker and parent guidance expert.

"It is far more important for the emotional well-being of families to pick and choose what they feel capable of doing, rather than abide by the strict rules of digital learning set by their individual schools," Komisar said. "Less is more now."

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