I have not had a cold or the flu for 4 years despite having asthma and COPD (brochiectasis). When I feel that my nose gets a bit stuffy and sometimes get a bit shivery I immediately take 1 tablespoon of Colloidal Silver which I keep in my mouth for 1 minute (it gets absorbed through the mucus membranes) and then swallow and 2 gel capsules of P73 wild oregano oil. I repeat at night and cold or flu does not progress. This way I also avoid having the flu jab which used to make me ill. Hope this will help someone. Regards, Maddy.