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Continuous positive airway pressure (CPAP) is the best-known treatment for sleep apnea, a disorder that raises the risk of high blood pressure and other health problems. A new study suggests that using a mandibular advancement device (MAD) is just as effective as CPAP for reducing blood pressure in people with sleep apnea at risk for cardiovascular disease. Published in the October 2026 issue of The American Journal of Medicine, the study reported findings from 180 people (85% men) with moderate or severe sleep apnea and high blood pressure who were randomly assigned to use either CPAP or a MAD for 12 months.

Bioengineer.org news storyFor people living with HIV, modern antiretroviral therapy can suppress the virus to levels below what standard laboratory tests can detect. Yet some patients on long-term treatment experience a curious phenomenon: a single test result showing a small, transient amount of virus in the blood, followed by an immediate return to undetectable levels. These events, known as viral blips, have puzzled clinicians and researchers for years, raising questions about whether they represent harmless statistical noise, brief bursts of viral production from hidden reservoirs, or early warnings of impending treatment failure. A new nationwide Swedish study, published in BMC Infectious Diseases, offers one of the most comprehensive answers to date. Drawing on the Swedish national InfCareHIV cohort, researchers analyzed data from 4,210 treatment-naïve adults who began antiretroviral therapy from 1 January 2007 onward, with follow-up data extracted through 30 September 2020. The median observation time was 5.5 years, with some individuals followed for as long as 13.7 years.