Wad should i use or wad to do to make my 5mth old baby breathe better? He has flu. Seems to get blocked when slping in aircon room. Use vicks vapo rub apply on baby's chest?

For me I tend to build my kids immune system up so tat they r able to get well faster. Letting ur kids take supplements is one of the methods to build their immunity which will let them fight the disease naturally wo the need for meds