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A new study provides grim insight into “long covid,” finding that even survivors of less-serious coronavirus cases had a heightened risk of kidney damage.

The dangers increase with the severity of the infection but extend even to those were not hospitalized, according to the paper published Wednesday in the Journal of the American Society of Nephrology. The risks include “end stage kidney disease,” in which the organ can no longer filter blood without transplant or regular dialysis.

The researchers wrote that given the massive scale of coronavirus infections in the United States and worldwide, “the numbers of people with long COVID in need of post COVID care will likely be staggering and will present substantial strain on already overwhelmed health systems.”

Here’s what to know

  • The authors of a study based on an enormous randomized research project in Bangladesh say their results offer the best evidence yet that widespread wearing of surgical masks can limit the spread of the coronavirus.
  • Those who are not fully vaccinated should not travel over the upcoming holiday weekend, Centers for Disease Control and Prevention Director Rochelle Walensky said.
  • Three health-care organizations issued a statement Wednesday against the use of ivermectin to treat covid-19. The American Medical Association, the American Pharmacists Association, and the American Society of Health-System Pharmacists expressed alarm at the exponential increase in “outpatient prescribing and dispensing of ivermectin” to treat covid-19, and called for an immediate end to its use outside of a clinical trial.