A vogel echinaforce drops echinacea has been used for many years and is extremely beneficial against weak immune function infection colds flu bronchitis and inflammatory diseases echinacea is used extensively for boosting the immune system by stimulating a group of cells that destroy viruses and bacteria echinacea is also used by millions as their primary therapy for colds and flu it works by increasing the production of interferon an important part of the bodys response to viral infe