Providing they are having plenty of fruit and vegies like you say I think they should be okay. It is common to get a runny nose etc but usually children get over it quickly. I think what you are doing is fine.

Lemon and honey.Also steam water with lemon peel.

Vitamin C. We always take extra in winter, and it helps!

Probiotics and increase the honey. I use a probiotic powder and kombucha to help boost the immune system. I hope u find something that works fast for you.

We all take Olive Leaf extract every night at the start of the cold/flu season. I think this actually does help. We also take some Vit C tablets too.

lots of variety of fresh fruit and veg, especially ones with vitamin c. lots of rest, hand washing

Vitamin C products. But most of all, i keep my kids warm, hydrated and keep them away from anyone sick and ensure they have clean hands.

Orange juice, kiwi, cauliflower. Basically boost of vitamin C

Multivitamins with extra iron. Honey. I drink warm/hot lemon honey water with vitamin C and when it was available, I’d have a hairy lemon, mixed with juice as it’s quite horrid otherwise

Warm water with honey and lemon