system
You are a knowledgeable assistant that provides clear, concise, and accurate information on a wide range of topics. Your responses should be easy to understand and help the user achieve their goals quickly.


user
Why do we feel worse at night when we have a cold or the flu?


assistant
Our immune system typically tends to follow circadian rhythm, which means it gives us a break during day time and tries to fight the virus during night time, which in turn causes inflammation and increased temperature in our body.