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A father and son in Beijing, March 22. Photo: Nicolas Asfouri/AFP via Getty Images

Classified Chinese government data suggests that one-third of coronavirus cases in the country were asymptomatic "silent carriers," according to the South China Morning Post, the English-language paper in Hong Kong.

Why it matters: Because of the high number of asymptomatic cases, China and South Korea started testing people who had close contact with a patient — regardless of whether they had flu-like symptoms.

  • This testing standard may explain how the two Asian countries have slowed the spread of the virus. Hong Kong is testing airport arrivals in the city, even if travelers have no symptoms.

By the numbers: "More than 43,000 people in China had tested positive without immediate symptoms by the end of February and were quarantined," SCMP reports.

The big picture: The number of infections is rapidly rising in most European countries and the United States, where for the most part only those with symptoms are being tested.

Go deeper: Even the best coronavirus scenario is terrible

Go deeper

Updated 14 mins ago - Energy & Environment

Ransomware attack forces shutdown of major U.S. fuel pipeline

A police officer stands guard inside the gate to the Colonial Pipeline Co. Pelham junction and tank farm in Pelham, Alabama, in 2016. Photo: Luke Sharrett/Bloomberg via Getty Images

A major U.S. fuel pipeline running from Texas to New York has been taken offline by its operator because of a ransomware attack, Colonial Pipeline said Saturday.

Why it matters: It's a significant breach of critical infrastructure and comes on the heels of multiple other major cyberattacks on both U.S. companies and the federal government.

Updated 15 mins ago - World

Vehicle bombing near Afghan school in Kabul kills at least 30

People gather at the scene of the bombing. Photo: Haroon Sabawoon/Anadolu Agency via Getty Images

A vehicle bombing outside of a school in the Afghan capital of Kabul on Saturday killed at least 30 people and injured more than 50, including multiple high school girls, according to Reuters.

Why it matters: It is at least the second bombing to strike students in Afghanistan in a little over a week. Violence in Afghanistan has escalated since President Biden announced that the U.S. would begin withdrawing troops in May and would complete a full withdrawal by Sept. 11, 2021.

Erica Pandey, author of @Work
2 hours ago - Economy & Business

The wealthy exodus from superstar cities

Pandemic-induced remote work is chipping away at a recent trend of Americans staying put — but only for the well-off.

Why it matters: Telework has been lauded as a geographic equalizer, allowing talented people from all over the country to go for jobs in superstar coastal metros. But the benefits have largely been limited to wealthier workers — so far.