My baby just got ROTA virus. so doctor recommend me to use infant power for a week. Has your baby have ROTA before? How did you look after yours?

I believe you meant your baby contracted rotavirus? As children with rotavirus tend to have severe diarrhoea, you should ensure that the child receives enough fluids through breastmilk or formula. Ask a doctor if your baby is suitable to receive oral rehydration such as electrolytes. In very serious cases, your baby might require an intravenous drip. http://www.mayoclinic.org/diseases-conditions/rotavirus/basics/symptoms/con-20026103