Oregano oil is reportedly very good. Also, please check out lemongrass (cymbopogon citrata), which is available as a tea (at HEB if you have them), and also thymol, which is a component of Listerine, and an inactive(?) ingredient in Vicks Vaporub.
Thank you everyone for your suggestions.
The littlest was the sickest, but doing much better today.
The oldest doesn’t have a good immune system so I’m making a list and heading to the store. I’m going to search more on vitamin D for her, she was using a B complex for energy in the afternoon.
I was achey, tired, and feverish yesterday and I did 4 drop of the oregano oil in juice twice and I feel fine today.
I had put 4 drops under my tongue before that and it burns and taste horrible, I can tolerate it in the juice.