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Pony Ma Huateng, Chairman and CEO of Tencent Holdings Ltd. Photo: Kin Cheung / AP

Tencent, the major Chinese internet company behind messaging platform WeChat, has built up a 10% stake in Snap, the parent company of Snapchat, per CNBC.

Why it matters: Snap shares fell 16% on Tuesday, and Tencent's purchase reads as "a vote of confidence." According to the Financial Times, Snap said it had been "inspired by the creativity and entrepreneurial spirit of Tencent and we are grateful to continue our longstanding and productive relationship that began over four years ago". Over the last quarter, Tencent purchased 145.8 million nonvoting shares, per CNBC; the internet giant also invested in Snap in 2012 and 2013.

Go deeper

USAID chief tests positive for coronavirus

An Air Force cargo jet delivers USAID supplies to Russia earlier this year. Photo: Mikhail Metzel/TASS via Getty Images

The acting administrator of the United States Agency for International Development informed senior staff Wednesday he has tested positive for coronavirus, two sources familiar with the call tell Axios.

Why it matters: John Barsa, who staffers say rarely wears a mask in their office, is the latest in a series of senior administration officials to contract the virus. His positive diagnosis comes amid broader turmoil at the agency following the election.

Bryan Walsh, author of Future
3 hours ago - Health

COVID-19 shows a bright future for vaccines

Illustration: Annelise Capossela/Axios

Promising results from COVID-19 vaccine trials offer hope not just that the pandemic could be ended sooner than expected, but that medicine itself may have a powerful new weapon.

Why it matters: Vaccines are, in the words of one expert, "the single most life-saving innovation ever," but progress had slowed in recent years. New gene-based technology that sped the arrival of the COVID vaccine will boost the overall field, and could even extend to mass killers like cancer.

5 hours ago - Health

Beware a Thanksgiving mirage

Illustration: Sarah Grillo/Axios

Don't be surprised if COVID metrics plunge over the next few days, only to spike next week.

Why it matters: The COVID Tracking Project warns of a "double-weekend pattern" on Thanksgiving — where the usual weekend backlog of data is tacked on to a holiday.