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A Google artificial intelligence system was better than 6 radiologists at identifying whether patients had lung cancer, according to a new Nature Medicine study reported on by Stat News.

How it worked: When looking at a single CT scan, the algorithm detected 5% more cancers than the humans and reduced false positives by 11%. When prior images of patients were included in the evaluation, the algorithm performed the same as the radiologists.

Why it matters: Screening high-risk patients for lung cancer reduces the risk of death, but false positives can lead to unnecessary and potentially harmful surgeries.

  • About half of lung cancers are diagnosed after they have already spread.
  • "These people have a technology that will improve the precision of screening tremendously," Otis Brawley, an oncology professor at Johns Hopkins University, told Stat.

What next? The system will now be subject to further testing. Google acknowledged this, and said that it's already working with clinical partners and has had pre-submission discussions with the FDA.

Go deeper: Scientists call for rules on evaluating predictive AI in medicine

Go deeper

Brazil begins distributing AstraZeneca coronavirus vaccine

Containers carrying doses of the Oxford/AstraZeneca vaccine arrive in Brazil. Photo: Maurio Pimentel/AFP via Getty Images

Brazil on Saturday began distributing the 2 million doses of the AstraZeneca coronavirus vaccine that arrived from India Friday, Reuters reports.

Why it matters: Brazil has the third highest COVID-19 case-count in the world, according to Johns Hopkins University data. The 2 million doses "only scratch the surface of the shortfall," Brazilian public health experts told the AP.

Sullivan speaks with Israel's national security adviser for the first time

Israeli national security adviser Meir Ben Shabbat U.S. Photo: Mazen Mahdi/Getty Images. U.S. national security adviser Jake Sullivan. Photo: Chandan Khanna/Getty Images

U.S. national security adviser Jake Sullivan spoke on the phone Saturday with his Israeli counterpart Meir Ben Shabbat, Israeli officials tell Axios.

Why it matters: This is the first contact between the Biden White House and Israeli prime minister's office. During the transition, the Biden team refrained from speaking to foreign governments.

Biden speaks to Mexican president about reversing Trump's "draconian immigration policies"

Mexican President Andrés Manuel López Obrador. Ismael Rosas/Eyepix Group/Barcroft Media via Getty Images

President Biden told his Mexican counterpart, Andrés Manuel López Obrador, on a phone call Friday that he plans to reverse former President Trump’s “draconian immigration policies.”

The big picture: The Biden administration has already started repealing several of Trump’s immigration policies, including ordering a 100-day freeze on deporting many unauthorized immigrants, halting work on the southern border wall, and reversing plans to exclude undocumented people from being included in the 2020 census.