Recommended essential oils 

Basil - coughs, chest infections. Use in combination with Thyme & Rosemary. Low dosage as powerful

Thyme - powerful - low dosage to help alleviate symptoms from viral infections or chest infections

Tea Tree - infections - especially fungal, anti-inflammatory, pain relief

Lavender - adaptogen - add to other oils for a synergised therapeutic benefit

Rosemary - anti-viral - helps prevent cross infection and aids recovery from viral infections.