Oscillococcinum is a homeopathic non-remedy for the flu. Its "active" ingredient is
The chances of water effectively treating flu is (I know some might find this hard to believe) none. Even if the water is packaged in tiny doses priced at about $1.50 - $2.00 per dose or $4.50 - $6.00 per day.
If you're going to pay that much for water that won't treat your flu, you might as well save $1.00 doing it.