In a New York Times op-ed, Surgeon General Vivek Murthy wrote that the U.S. needs to focus on its "epidemic of loneliness," and that half of Americans are lonely — including himself. He pointed out that some of the health risks of loneliness, such as depression, anxiety, heart disease, dementia, and stroke, make it comparable to smoking daily. He proposed a three-step process to help with the epidemic: invest in social infrastructure, reconsider how we use technology, and strengthen our personal connections.
A new study shows that being bilingual can help prevent dementia. Researchers tested hundreds of older people on learning, memory, language, and decision-making and found that those who used two languages daily performed consistently better than those who knew only one language. 
Researchers and doctors at the National Health Service in the United Kingdom have built an artificial intelligence application that can detect cancer. According to new research published in The Lancet, the AI tool was developed using hundreds of lung scans from real patients, training it on the subtle differences between cancerous and non-cancerous growths that are often difficult to see with the human eye.