They are now saying they think it will be ok to mix the vaccines so you could get one of each. Sorry, but this is really not filling me with confidence. I won’t be taking it this year when I’m not happy they really know what they are doing!
On a less flippant note, this policy is a response to what is now a catastrophic situation for UK public health.
We're faced with an absolute emergency, and I don't think it's realised just how bad things are.
The rate of increase of the new strain is now ahead of any feasible vaccination programme. Thus, any vaccinations, even if slightly less effective, will directly save lives. At a very rough guess, the proposed change in approach might save 100,000 souls. Perhaps many more if our health service is completely overwhelmed. It's that bad.
Scientifically, all these vaccines work in a very similar way, by tricking the body into making the surface spike protein. So you can reasonably expect a second dose from any of the vaccines to boost immunity in a similar way. Of course that's not absolutely certain until tested.
The protection in the short term from a single dose looks very good. The second dose is required more for long term immune memory.
Alongside the vaccination, the govt needs to get out of denial and impose a strict national lockdown. The emergency measures on vaccination need an emergency response across the board to go with them.
Finally, sorry that my first response was rather grumpy. My middle son has tested positive and the whole household is now apprehensively in isolation.