The CDC raised its benchmark for levels of the Covid virus in wastewater, adjusting a key metric for assessing the disease’s transmission. As a result, officials may now classify a level that once counted as high transmission as moderate instead. nbcnews.com/data-graphics/cd…

The CDC raised its benchmark for levels of the Covid virus in wastewater, adjusting a key metric for assessing the disease’s transmission. As a result, officials may now classify a level that once counted as high transmission as moderate instead. nbcnews.com/data-graphics/cd…

Trump: "I’m surprised CNN is here is covering me. You shouldn’t be here.” CNN’s Kaitlan Collins: “The United Nations allowed us in, sir.”

Dozens of lawsuits have been filed against the companies behind popular GLP-1 drugs Ozempic, Wegovy and Zepbound, claiming the drugs led to a rare type of vision loss. ABC News' Elizabeth Schulze reports. abcnews.visitlink.me/ENupsJ

Mask up! Covid is airborne and the best way to protect yourself is with a well fitted N95 respirator

One night of bad sleep makes your brain 60 percent more reactive to negative experiences. The amygdala, the brain's threat detector, fires harder without sleep, and the prefrontal cortex, the part that calms it down, goes quiet. The result is a person who overreacts to everything and cannot explain why. Matthew Walker at UC Berkeley showed this in a 2007 study that scanned the brains of people who had been awake for 35 hours. The amygdala was 60 percent more activated by negative images in the sleep-deprived group compared to the rested group, and the communication between the amygdala and the prefrontal cortex had been severed. This is why a small comment from a coworker can ruin your morning after a bad night. The brain lost its brake pedal while you were lying awake, and now every emotional signal arrives at full volume with no one at the controls. The comment did not change. Your brain's ability to handle it did. The study found that the sleep-deprived brain did not just overreact to negative stimuli. It also failed to distinguish between low-threat and high-threat signals. Everything got the same alarm. A slightly rude email and a genuine crisis received the same cortisol response, because the system that ranks threats by severity had gone offline. The worst decision you make today might not be a thinking error. It might be a sleeping error. The research says eight hours is not a luxury. It is the maintenance cycle that keeps the emotional thermostat working, and skipping it turns the volume up on everything that goes wrong. pubmed.ncbi.nlm.nih.gov/1795…