I see the developments so far in two stages: 1. The vaccine development and trials more or less happened in a science-backed way (not saying this was perfect b

I see the developments so far in two stages: 1. The vaccine development and trials more or less happened in a science-backed way (not saying this was perfect but it was say 90% right way to do) 2. The actual deployment : this is worrying because the scientists who have developed the Pfizer/BioNTech vaccine and the Moderna one haven't tested delayed doses and are rightfully raising the alarms. The Oxford-AZ one is tricky because they have only tested the two full dose regimen with the right sample sizes and that's the one approved. From memory, there was some noise about delayed doses being approved but this is really shaky ground. Respected journals like BMJ [0] are questioning the lack of data around this. tl;dr : Delaying doses not tested as per protocols and seems to be optimising for reach disregarding the fact that it wasn't tested and should rightfully worry most of us :( [0]https://www.bmj.com/content/372/bmj.n18 https://www.bmj.com/content/372/bmj.n18