You need to mix the Naproxen with pissing on the grave in order to have max immunity defence.

Naproxen, has previously been revealed to exert antiviral activity against influenza A/B virus by impeding nucleoprotein (NP) binding to RNA.

I think the Health Minister for France had said not to use ibuprofen as it's been proven to possibly aggravate the infection. Although naproxen or maybe diclofenac could be a viable replacement.