Bill Gates warns that malicious use of artificial intelligence could facilitate the design of biological weapons and cause a health catastrophe worse than Covid. He identifies neither a confirmed threat nor a timetable, but urges governments to evaluate models, conduct independent audits, and coordinate surveillance of the air, wastewater, and blood to detect outbreaks early. A study published in Science in October 2025 found that some AI-redesigned DNA sequences can bypass screening software used by synthetic DNA providers, without demonstrating the creation of a pandemic. The Microsoft co-founder also calls for stronger security in software used by hospitals, banks, and power grids amid growing cyberattacks, including ransomware payments made in cryptocurrencies.
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