There is a vaccine for influenza but most years it is totally ineffective because the influenza virus that comes along is not that captured in the vaccine. Influenza kills more young people than coronavirus. Coronavirus mainly kills the elderly.
The evidence on contagiousness is very mixed. NHS staff have all been offered antibody testing and the results are showing tiny proportions having antibodies. That suggests most people who are exposed don't even get the virus (so there is therefore no systemic immune response to pick up in testing). The virus particles are simply coughed / sneezed out of the nose and throat and they don't even become infected. Statistically speaking coronavirus is a relatively harmless virus. In the same way that ecstasy is a relatively harmless drug - but a tiny minority of people who take it, die. To describe it as a deadly virus is just factually inaccurate. We all take risks every day. Leaving the house, driving the car, crossing the road, drinking alcohol. The risk of dying from coronavirus is relatively low. Unless you're elderly and in a care home. The soundbite should have been 'protect the care homes' - not 'protect the NHS'.