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The man behind Ello, an "anti-Facebook" social network that made headlines in 2014 for its ad-free approach, is back with something new. It's Wuu, a quirky, yet simplistic, mobile app reminiscent of Snapchat and Instagram (minus public posting or "likes"). As with Ello, it's unclear how Wuu plans to make money as it won't have ads and is focused on user privacy.

Paul Budnitz, Ello's co-founder and original CEO, released Wuu yesterday on iOS, though the app is still invite-only. Budnitz still remains part-owner of Ello, though he no longer runs the company. The social network no longer makes headlines but has found popularity among artists. Earlier this month, Ello raised $2.5 million in new funding.

Wuu money: SEC filings revealed Wuu raised between $725,000 and $1.3 million over two convertible note rounds last year. Budnitz declined to say more about dollars, but did reveal to Axios that Founders Fund is the lead investor, adding that the firm told him to "do whatever the hell you want" as far as building the app. Other investors in Wuu include Vermont-based VC firm FreshTracks Capital (also an Ello investor), and a few undisclosed Hollywood celebrities.

Go deeper

Updated 1 hour ago - Health

CDC: Vaccinated people in COVID hotspots should resume wearing masks

CDC director Rochelle Walensky and top infectious disease expert Anthony Fauci at a Senate HELP committee hearing. Photo: J. Scott Applewhite-Pool/Getty Images

The Centers for Disease Control and Prevention issued updated guidance on Tuesday recommending that vaccinated people wear masks in indoor, public settings if they are in parts of the U.S. with substantial to high transmission, among other circumstances.

Why it matters: The guidance, a reversal from recommendations made two months ago, comes as the Delta variant continues to drive up case rates across the country. Millions of people in the U.S. — either by choice or who are ineligible — remain unvaccinated and at risk of serious infection.

Olympics medal tracker

Data: International Olympic Committee; Chart: Connor Rothschild/Axios
Bryan Walsh, author of Future
2 hours ago - Politics & Policy

U.S. students fell 4 to 5 months behind during pandemic

An empty classroom in Pinole, Calif. Photo: David Paul Morris/Bloomberg via Getty Images

Elementary school students in the U.S. ended the school year four to five months behind their expected level of academic achievement, according to a new report.

Why it matters: Months of school closures and often inferior remote education eroded what schoolchildren would have learned since the pandemic began, and caused some to go backwards.