Watch: Three theories have emerged on what happens in the body during long Covid, and its possible causes
Some days the high-speed news cycle can bring more questions than answers. WSJ’s news explainers break down the day's biggest stories into bite-size pieces to help you make sense of the news.Some see Web 3.0 as the next generation of the internet, a decentralized version of the web based on the blockchain. Here are the key principles behind it, and why skeptics are unconvinced it could scale globally.
Illustration: Amber BragdonSatellite images show Russian missiles and large-scale artillery stationed around Ukraine’s borders. WSJ examined images of the equipment deployed by Moscow to understand why U.S. security experts say Russia could stage an attack from multiple locations. Photo composite: Eve HartleyThis year’s Super Bowl drew advertisers willing to pay up to $7 million for a 30-second spot.
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Long COVID and kids: more research is urgently neededLike adults, children can experience long COVID, but few studies of the condition include young people. That has to change.
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Mass. refuses to excuse most workers from COVID vaccine mandateMassachusetts has denied 89% of the requests it has received for exemptions to a vaccine mandate covering most state workers, according to a state data report obtained by WBUR:
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Treating long-haul COVID continues to confound medical community: ‘More questions than answers’In the nearly two years since the pandemic began, there isn’t one treatment or even any specific diagnosis for the many people with persistent or new symptoms after an infection.
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Canada protests sound common COVID refrain: ‘We stand for freedom’The in-your-face protests that have fueled frustrations around the country and world have been aided by publicity and support from far-right and anti-vaccine groups.
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Tracking COVID-19 infections: time for changeIt's time to change how we track COVID-19 infections, says biostatistician nataliexdean
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