Answered in another comment, but as a summary:Perhaps you could answer this. We were told repeatedly last year that vaccines were the way out of this. Now it is quite apparent that they are no longer regarded as the way out of the pandemic by our lords and masters, who are instead keen to further increase mass testing as a prerequisite to some supposed reopening. Why have they made this change?
- Caution (nothing is certain, we don't know what will happen for certain next month even with a vaccine so it is somewhat naive to think we can plan and not have to potentially change that plan as we get closer to the date - if anything I'd say any plan that says by date x we will be doing y, regardless of anything else is utterly stupid as so much about the situation could have changed by then).
- To prepare people for the worst (like when we were told last year that a vaccine may be a year or more away).
- Scientists being scientists (it is their job to focus on the specifics of the spread of the virus - its governments job to take what the scientists say and mix it with input from other experts, it isn't the fault of the scientists that government seems unable to do this due to their incompetency).
- The current high spread of the virus and high level of deaths, hospitilations and cases (which hopefully will reduce quickly thanks to the vaccine, but it is still pretty high at the moment and has been high since December).