covid
FDA panel says Covid booster should target XBB subvariant
The new round of Covid shots should target an XBB subvariant of the virus, FDA advisers unanimously recommended yesterday. By targeting an XBB strain, the shot will effectively ward off other forms of Covid that are circulating, scientists from the VRBPAC said. Pfizer and Moderna are developing new mRNA shots this summer to distribute in the fall, the Wall Street Journal writes, as is Novavax with its protein-based shot.
That said, fewer people seem likely to to take the inoculations. Only 17% of adults received the latest booster that targeted Omicron, per the CDC. The new shot will be paid for partly by commercial insurers, as opposed to before, when it was fully government-funded.
lecanemab
Formally mitigating risk for Alzheimer's drugs
The buzzy Alzheimer's drug lecanemab is most likely going to secure approval, and experts are cautiously optimistic — but also worried. Lecanemab, and a similar amyloid-clearing experimental medicine, donanemab, offer hope to people with the neurodegenerative disease, but also have the same risks to the brain: They can cause tiny hemorrhages and swelling.
Jason Karlawish, a medical ethics and neurology expert at University of Pennsylvania, opines that the FDA ought to create a Risk Evaluation and Mitigation Strategy, or REMS, to create a balance between access and safety for these medicines. Regulators have done this for more than 300 drugs since 2007, requiring education and monitoring around a drug to manage or prevent risk.
"I'm optimistic. Some patients will benefit from these drugs. But I'm also a realist. Some patients will be harmed," he writes. "A REMS will mitigate the worry that these harms shouldn't have happened."
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