Have worked from home for the past two days...

[Paul F.]

To avoid recriminations about "using too many sick days", I usually report in to work, and go into the bosses office (sick) and tell him I'm going home sick...
Coughing up icky stuff on his desk is pretty thorough at convincing him that it's necessary.
(Actually, the new boss is much cooler than the old boss, and probably wouldn't require this measure....).