Flu
At my age, together with still working and living by myself, a dose of flu would be mildly inconvenient. I have had the jab for the last 8 years and I haven't had any 'flu like symptoms' in that time. I have no idea if this is good luck or the effect of the jab. Re unpleasant side effects, these are mentioned in a leaflet I was given to read after I had had this year's jab!