Info about the J&J booster.... I might have to look into "mixing" since I got the Moderna vaccine earlier. It seems the J&J antibodies aren't falling off like they're seeing in Moderna and Pfizer.
https://www.msn.com/en-us/news/us/second-dose-of-j-and-j-vaccine-gives-strong-boost-company-reports/ar-AANJ3BL?li=BBnb7Kz