Colds and Flu AntiViral Tonic (ColdLess) – now even stronger. Antiviral herbs for colds, flu, rhinitis and viral infections; Swine Flu; Bird Flu; use also for Covid-19 (no scientific evidence at this point in time that it kills this covid-19 virus, but as these herbs have been proven highly effective against cold and flu viruses it is highly likely that this tonic will be effective both to protect against this strain of coronavirus and its variant and help to improve the functions of lungs, cardiovascular system and digestive organs, etc., after a positive diagnosis, i.e. post-covid). For more information on Colds And Flu, please read here.