The Download: chatbots for health, and US fights over AI regulation

A new product called ChatGPT Health by OpenAI aims to provide a better alternative to searching medical symptoms online, with 230 million people already using it for health-related queries weekly. In the US, a battle over AI regulation has intensified, with President Trump signing an executive order to prevent states from regulating AI, sparking a debate on national AI policy. As measles cases surge in the US, scientists are turning to wastewater tracking to identify and prevent outbreaks. The tech industry is taking on more debt to fund AI projects, while TikTok has finalized a deal to create a new US entity.