To be clear with the "like the flu" remark that was strictly for young healthy adults.
This virus is pernicious in part because it is bloody brutal on a large segment of society while being relatively inconsequential (long COVID aside) in the main part for others who can thus act as carriers and spread it on.
The first phase of the UKs vaccination programme is to vaccinate in stages at risk groups down to the over 50s (as well as the clinically vulnerable under 50s). So far in the UK over 99% of deaths during the pandemic have come from these groups. Less than 1% of deaths come from healthy under 50s.