Vaccination, immunity… Has the Covid really become comparable to the flu?

A sting in each arm. Since this Tuesday, it is possible to be vaccinated jointly against the flu (the campaign officially starts) and against Covid-19 (the new vaccines adapted to Omicron have been gradually available since October 3). The goal: for vulnerable people to be as well protected as possible against each of these two respiratory diseases, which are now compared on a regular basis. But are they really to be put on the same plane?