Here I will list a few Herbs that really helps you to fights a Cold or the Flu.

Cistus against Viruses : A test with 100 Patients in Berlin showed good results on sore/infection throat when you have a cold. The results where very Positive, so I can only recommend Cistus when you have a cold.

Forget all about Echinacea it just have a placebo effect, it just dont work.

Sambucus (elder) against the Flu : A study in Jerusalem showed that that patients taking Elder shortend there time with the Flu down from 7 down to 2 sick days, Elder is also good for Kids. Also highly recommended.

Thymine against sore throat : Thymine is a very good option against infection in the throat.

Now as always this is just surgestions

Note : Just had a sore throat I then took 4 mg of vit C spread over the day and 2-3 times a large cup of Thymine tea, the next I had a 70% improvement, almost no sore throat anymore.