Ugh, if anyone else has an in-law saying that shedding is just superstition and getting yet ANOTHER booster this close to Thanksgiving is not a problem, you could send this FDA publication from 2014 on how to collect data on vaccine shedding. https://www.fda.gov/regulatory-information/search-fda-guidance-documents/design-and-analysis-shedding-studies-virus-or-bacteria-based-gene-therapy-and-oncolytic-products
Dr. Raszek has a 5-part video series on shedding and exosomes. This is episode 1 https://www.youtube.com/watch?v=K9jOxkZJQfg