RSV has reached epidemic levels in the southern US. Also, beech leaf disease is spreading rapidly in Massachusetts.<h2>RSV Drug For Infants In Short Supply</h2>Respiratory syncytial virus, or RSV, is a common illness that—for most—looks like a common cold. But for infants, it can be an intense illness, leading to hospitalization. That’s why it was a relief for parents and physicians when an immunization drug for all infants was approved in July.However, it’s become clear the demand for the drug is greater than the supply. This week, the <a href="https://www.sciencefriday.com/segments/rsv-drug-for-infants/?utm_source=wnyc&utm_medium=podcast&utm_campaign=scifri" target="_blank">CDC issued an alert</a> about the drug’s limited availability, and recommended that only infants under 6 months and those with underlying health conditions receive it until further notice. An RSV spike in the southern US has reached seasonal epidemic levels, a sign that transmission will likely climb in other areas soon.Katherine J. Wu, science writer for The Atlantic, joins guest host Flora Lichtman to chat about this story as well as mouse mummies in the Andes, Hurricane Otis defying forecasts, a secret benefit of “Asian glow,” and other big news from the week.<h2>Beech Leaf Disease Is Spreading Rapidly in Massachusetts</h2>A new tree disease has spread in forests in Massachusetts, joining invasive pests and climate change as top priorities for foresters to address.The state has found <a href="https://www.sciencefriday.com/segments/beech-leaf-disease/?utm_source=wnyc&utm_medium=podcast&utm_campaign=scifri" target="_blank">beech leaf disease</a> in more than 90 communities since it was first discovered in the state in 2020.“Lately this has been one of our biggest concerns and my team devotes a lot of time to it. We do expect to see a lot of long-term impact and trees lost from it,” said Nicole Keleher, forest health program director at the state Department of Conservation and Recreation.Beech leaf disease is caused by an unusual parasite: a nematode, which is a microscopic roundworm, that infects the leaves and buds. Researchers believe that it may be spread by birds, insects and wind. This makes it more difficult to treat than visible insects like the emerald ash borer that can be somewhat contained by asking people not to transport wood between forests, according to Keleher.Infected leaves can develop dark patches or stripes, and often will curl up. The infection causes the tree’s leaves to fall off and can eventually starve the tree, which can die within a few years.<a href="https://www.sciencefriday.com/segments/beech-leaf-disease/?utm_source=wnyc&utm_medium=podcast&utm_campaign=scifri" target="_blank">Read the rest at sciencefriday.com.</a>To stay updated on all things science, sign up for Science Friday's <a href="https://www.sciencefriday.com/newsletters/?utm_source=wnyc&utm_medium=podcast&utm_campaign=scifri" target="_blank">newsletters</a>. Transcripts for each segment will be available the week after the show airs on <a href="https://www.sciencefriday.com/episodes/october-27-2023/?utm_source=wnyc&utm_medium=podcast&utm_campaign=scifri" target="_blank">sciencefriday.com</a>.

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