No-one can be an expert in all things, and the average Facebook user lacks the education and experience to be an expert on such complicated subjects as epidemiology or infectious diseases.
All your questions can be answered, if that is what you want. But once you learn your answers, you can never unlearn them. - American Gods, Neil Gaiman
"Knowledge is power, power is energy, energy is matter, matter is mass, and mass changes time and space." - I Shall Wear Midnight, Terry Pratchett