from my understanding if you take a different vaccine your body treats it as a virus which it already knows from the first vaccine you took and then attacks the

from my understanding if you take a different vaccine your body treats it as a virus which it already knows from the first vaccine you took and then attacks the vaccine generating antibodies. So technically it should either work as a booster or if your body has forgotten about the virus (don't know how that works) then act as a first dose.