Its an excellent combination of herbs to help boost immunity on immediate basis. It’s an 8 day course. It’s to be taken when you feel you need an immediate immunity support for your body, this is not a long term solution but an need to basis approach to heal your immune system. Good immunity ensure that body learns after every infection and does not allow the body organs to malfunction. It helps to boost the body function during any cough and cold thus resulting in better recovery and no clogging of sinuses.