They cannot convey a tidy explanation, because no one knows quite what to say about a drug that's constantly mutating, one whose effects can't be pinned down.
Microbes are constantly mutating and evolving into new and deadly forms.
Cancer cells are constantly mutating, he says, and these changes actually impact which type of cancer drug and treatment a patient should receive.
Whether conscious or not, they're constantly mutating and however much we want to banish them, they keep on coming back to us.
Although viruses such as the influenza virus and HIV are constantly mutating in significant ways, measles virus doesn't change very much.
Although there are many diverse pathogens, many of which are constantly mutating, it is a surprise that a majority of individuals remain free of infections.
In the decade since VICE UK started, the world around us has been constantly mutating with the kind of manic, unpredictable intensity of Nicolas Cage in pretty much any single one of his movies.
But it's the drug-resistant forms of the disease, MDR-TB (multidrug-resistant) and XDR-TB (extensively drug-resistant) -- which are constantly mutating and require treatments so onerous that nearly one-third of all patients die -- that pose the most serious cause for concern.
"The greatest thing about interactive media is that it is constantly evolving, mutating and assuming new forms," said Brad Johnson, the 41-year-old co-founder of Second Story and its creative director.
