One thing that commonly happens each year during CNY, other than the traditional foods and culture, is the 'Germs Spreading'.
Coughing can be heard here and there. My work place, the public places and even my house. Too much of heaty food stuff and change of the weather are the main reason of the sickness, I guess. I had been drinking a lot of water (more than I usually did) just to prevent myself from fallen sick as I can feel my body is fighting against the virus now.
So my friend, do take care of your health. Drink more water and eat more fruits and vegetable (especially during CNY)