How to make 8 months old baby more comfortable at night when he getting flu and cough ?

Comfort measures: You may want to avoid too much milk as this may generate more mucus for the little one to deal with. After a soothing warm bath, you can continue the humidification by setting up a vaporizer/humidifier in baby's room. Use any of the commercially available devices to help remove excess mucus from baby's nose as well. Best of luck- no one sleeps when baby doesn't sleep...