For the I Gotta Sickness For The Thiccness Shirt and I love this Pfizer-BioNTech and Moderna vaccines, there is no evidence for or against this strategy. The only data is from the clinical trials themselves, which only assessed one schedule (two doses within a month). However, in the UK, studies of the Oxford-AstraZeneca vaccines included a subset that had longer gaps (8-12 weeks), which indicated greater immune response. However, this was a smaller group so it is difficult to tell how robust this result is. It is not clear if the same will be true for the Pfizer-BioNTech or Moderna vaccines.