Theoretically, you can prepare for a pandemic. Realisitically, unless you are already practicing isolation from public contact, you are not going to prevent infection.

Give it another 50 years or so, when nanite technology advances enough to where we can receive an innoculation of bug-killer robots that will last a lifetime and go after viruses and bacteria inside the host.
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The ultimate result of shielding men from the effects of folly is to fill the world with fools.
-- Herbert Spencer, English Philosopher (1820-1903)