They still don't get it, if you don't feel sick, you DON'T need a BULLSHIT test to tell you that you ARE sick. There is NO SUCH THING as an asymptomatic carrier - IF YOU HAVE A DISEASE OR VIRUS, YOUR BODY WILL SHOW IT SOMEHOW, maybe a headache, fever, stomach ache, bruising, swelling, bleeding, diarrhoea....something will show up. You can't be walking around healthilty and spreading some hidden germs to everyone around you.