Scientists used artificial intelligence to design genetic codes that produced functioning viruses never before found in nature. They infect bacteria, not humans—but the breakthrough raises an obvious question: could we someday design a virus that infects people? Dr. Terry Simpson explains what scientists accomplished, why we could not do this in 2019, and what it does—and does not—tell us about claims that COVID-19 was designed. Plus, measles costs millions, Cyclospora declines, the first mRNA flu vaccine arrives, and new studies examine testosterone, dementia, vitamin D, vegan diets, and tirzepatide.



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