A jury has found Meta and YouTube liable in a first-of-its-kind lawsuit that aimed to hold social media platforms responsible for harm to children using their services.

After about a month of hearing from addiction experts, therapists, platform engineers and executives, including Mark Zuckerberg, a jury has heard closing arguments before heading to the deliberation room to decide whether social media companies should be liable for harms caused to children using their platforms.

A 20-year-old woman is seeking to hold social media companies responsible for harms to children who use their platforms.

For years, social media companies have disputed allegations that they harm children’s mental health through the way they design their platforms, deliberately addicting kids and failing to protect them from sexual predators and dangerous content.

Mark Zuckerberg and opposing lawyers dueled in a Los Angeles courtroom Wednesday, where the Meta CEO answered questions about young people’s use of Instagram, his congressional testimony and internal advice he’s received to be “authentic” and not “robotic.”.

Adam Mosseri, the head of Meta’s Instagram, testified during a landmark social media trial in Los Angeles that he disagrees people can be addicted to social media platforms.

Jurors in a landmark social media case that seeks to hold companies responsible for harms to children got their first glimpse into what will be a lengthy trial characterized by dueling narratives from the plaintiffs and the two remaining defendants, Meta and YouTube.

The world’s biggest social media companies face several landmark trials this year that seek to hold them responsible for harms to children who use their platforms.

A federal jury says CVS, Walgreens and Walmart pharmacies didn’t do enough to stop the flow of opioid pills into two Ohio counties.

Cities and counties in the U.S. that want to hold pharmacies accountable for the opioid crisis are closely watching a federal trial that’s coming to a close.

FILE - In this June 28, 2020 file photo, Texas' Attorney General Ken Paxton waits on the flight line for the arrival of Vice President Mike Pence at Love Field in Dallas. “The legal services cannot be adequately performed by the attorneys and supporting personnel,” of the attorney general’s office, Paxton wrote. In response to questions for this story, Kayleigh Date, spokeswoman for Paxton's office, said “the contract speaks for itself." It’s unclear where the request for $43 million stands, and Paxton’s office did not answer questions about it. For instance, while Lanier was representing two Ohio counties in their landmark opioid lawsuit, Texas used state employees for its similar case against pharmaceutical company John­son & Johnson.