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Researchers have identified potential genetic risk factors that could explain why some people lose their sense of smell and taste after being infected with Covid-19. The two signature symptoms are thought to arise after the virus damages infected cells in the nasal cavity.
The cells, which are part of an area called the olfactory epithelium, protect neurons linked to smelling. Although the exact cause for this sensory loss is not yet known, a new study suggests that two genes – called UGT2A1 and UGT2A2 – in the nose tissue that help metabolize odors could offer an explanation.
A 57-year-old man with life-threatening heart disease has received a heart from a genetically modified pig, a groundbreaking procedure that offers hope to hundreds of thousands of patients with failing organs.
It is the first successful transplant of a pig’s heart into a human being. The eight-hour operation took place in Baltimore, and the patient, David Bennett Sr. of Maryland, was doing well three days later, according to surgeons at the University of Maryland Medical Center.
Researchers say they have found a second patient whose body seemingly had rid itself of the human immunodeficiency virus (HIV) that causes AIDS — supporting hope that it may be possible someday to find a way to cure more people of the virus.
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