While there are 3 different strains of the flu currently circulating, you may not have a treatable version.
Carrie Stefanson of Vancouver Coastal Health says there is some confusion between the respiratory flu and the stomach flu, which the current vaccine does not prevent.
Some people are experiencing what they say is the flu, the stomach flu which is more of a Norovirus, and those symptoms are vomiting and diarrhea, just nausea and that usually lasts about 48 hours.
The Center for Disease Control and Prevention reports that the overall effectiveness of the 2018 vaccine is between 40 and 60% for Influenza B, H3N2 and H1N1, however there is no vaccine for the stomach flu.
Cole Kelly, Evolution News