Stay home if you’re sick. If you do have swine flu, you can give it to others starting about 24 hours before you develop symptoms and ending about seven days later.
That’s good advice. If you’re sick, I don’t want you coughing over the cube wall or across the aisle in the plane. You don’t get brownie points for showing up sick and infecting everyone else.
MayoClinic.com has more information and advice about swine flu.