Have you heard the latest brilliant
idea from the UK [non-elected] government? They want people to be vaccinated against the seasonal influenza virus with last year's left over vaccines (to save money, perhaps?). Thing is, I'm fairly sure the virus mutates at a rate that would make last year's vaccine pretty useless against this year's influenza. I'm not trained in medicine though, so all I have to go off is heresay and conjecture.
Edit: Just read it back. "Fairly sure" based on "heresay and conjecture". Funny stuff Mawkish. Well done.