Bee Propolis, you can find it in a dropper - it's cut w/ alcohol to make it less gummy. It's worked in every instance I've tried it in the last 9 mos:

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Bacteria and viruses do not develop a resistance to Propolis.

Propolis has been found to help:

Fight many diseases
Regulate blood cells that clump together
May help reduce strokes
Control free radicals
Prevent damage caused by heavy metals (lead, mercury, caladium)
Enhance immune system
Promote healing
Reduce pain, inflammation, and fever
Act as an antibiotic without side effects
Speed cell growth
Stimulate cells that destroy invading organisms
Skin irritations
Cuts and burns
Psoriasis and eczema
Acne
Absorption of certain nutrients