Yes, you can get Influenzinum online - check out http://abchomeopathy.com/flu.php
I have no financial connection with this company/website, but have ordered a few remedies from them and have been completely satisfied with their service each time I've ordered from them.
I have not used Influenzinum, but have used Oscillococcinum as prevention; I seldom get the flu when I am good about taking my weekly dose of Oscillococcinum as prevention (I only take 1 capful, not the whole tube like the instructions say...I'd only take the whole tube if I actually got the flu).
Chronic Lyme Disease, Chronic Bartonella (clinical dx only), Gluten & Sulfite Sensitivity, Many Food/Inhalant/Medication/Chemical Allergies & Intolerances, Asthma, Gut issues (dysmotility, non-specific inflammation), UCTD ("Secondary Lupus-Like Syndrome"), Osteoporosis, chronic Lymphopenia, etc.; G-Tube; Currently trying to wean off TPN.
Meds: Pulmicort, IV Ceftazidime, Heparin (to flush PICC line), Claritin, Domperidone, Colloidal Silver (used topically), probiotics, Milk Thistle, Ailanthus, homeopathy.