It's wrong to come to work sick.
Lucas feels sick this morning and wonders whether he should go to the office today.
Lucas wants his boss to think he is a good employee.
Lucas calls his boss and tells him he won't go to the office today because he doesn't want anyone in the office to catch his bug.
Lucas goes to the office and doesn't mention feeling sick.
Lucas stays home and his colleague stays healthy.
Lucas' colleague catches Lucas' virus.