While the CDC website denies that shedding exists, the FDA has a Guidance Document to Help Companies Design Studies to Measure the Shedding

 Thu 10:34 am +01:00, 1 Jul 2021  

posted by Weaver

https://twitter.com/RealDrJaneRuby/status/1410233200182542337?s=20

https://www.fda.gov/media/89036/download