A friend of mine swears by cutting an onion and leaving it out in the open near where you are helps clear things up pretty quick. She's very rarely ever sick.
Boil 3 garlic cloves 2 lemons cut in half 1 orange cut in half 1/2 of an onion preferably purple and drink it as tea with a teaspoon of honey really does work on a cold.
We're definitely going to try both of these, we just don't have time for him to stay sick and I have to be careful and not catch it either. Thank you both!