Have you heard of Thieves Oil? The story goes that during the plague there were four thieves who were robbing plague victims. They never caught the plague themselves. When they were caught, the sherrif offered them their freedom if they told him how they avoided getting infected. Their day job was perfumers. They had created a concoction of essential oils including clove, lemon, cinnamon, eucalyptus and rosemary. They applied it to their wrists and neck. These oils are immune system enhancers.
Another story I came across when checking this out was about a group of 200 cinnamon factory workers whose friends and families had the Spanish flu of 1918 but not a single one of the workers came down with it. They attributed it to the cinnamon dust they were exposed to daily.
Thieves oil is available online but you can easily make it yourself (I did.). The ingredients are all at the health store and cost half as much as a doctor visit. And you'll have enough for a long time.
Here's a site with the recipe: http://www.think-aboutit.com/health/ThievesOil.htm
This flu might be a double whammy. A health official has "warned" us of the possibility of the flu wave hitting and then returning a few months later more deadly (remember there is always foreshaddowing in a good plot). Oddly, the web bot's predictive linguistics indicate a similar pattern.