guai low's mindset

During a conference meeting... below conversation takes place:

sei guai low boss "is everyone sick in this meeting room? Because everyone is blowing their noses, it really worries me..."

So, I thought he is a very good and considerate boss, he cares about his staff health, and worried they are sick... but the following conversation startled me..

sei guai low boss "Because if it is, I am going to wear the mask. Sorry guys."

........