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0 pointschimeracoder8y ago0 comments

> I'm sure that it is much more complicated than this, but I wonder how long the virus can remain immune to all previous '99%' cures? Maybe eventually we could come up with enough of these and then administer them all at once.

That's basically what HAART (the technique we've used to treat HIV successfully for the last 25 years) is. People take three antiretrovirals simultaneously. They're designed such that, for the virus to adapt to one, it has to make itself more susceptible to one of the other two.

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hn_throwaway_998y ago

> They're designed such that, for the virus to adapt to one, it has to make itself more susceptible to one of the other two.

That's not really accurate. HAART works because the 3 drugs are taken simultaneously, and it's extremely unlikely for a virus to get random mutations that confer resistance to all three in one generation.

chimeracoderOP8y ago

> That's not really accurate. HAART works because the 3 drugs are taken simultaneously, and it's extremely unlikely for a virus to get random mutations that confer resistance to all three in one generation.

That is literally exactly what I said. The drugs are taken simultaneously, and it is very difficult to develop resistance to all three simultaneously, because becoming more resistant to one means becoming more susceptible to another.

hn_throwaway_998y ago

Not sure if it's just miscommunication, or you misunderstand how HAART works, because you said "That is literally exactly what I said", and then in your next sentence repeat the statement that is false, "becoming more resistant to one means becoming more susceptible to another."

For example, suppose you take ATripla, which is a combination of efavirenz, emtricitabine, and tenofovir. If a viral particle has a random mutation that confers resistance to, say, efavirenz, that mutation does not make the virus more susceptible to emtricabine or tenofovir. The fact is the virus was already susceptible to those two drugs (that's why you take tests that specify your viral strain's pre-existing resistances to determine the best drugs for you before you start HAART), so it still is unable to replicate.

It's just a matter of statistics, not that resistance-granting mutations naturally make the virus more susceptible to other drugs.

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0 pointschimeracoder8y ago0 comments

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hn_throwaway_998y ago

> They're designed such that, for the virus to adapt to one, it has to make itself more susceptible to one of the other two.

chimeracoderOP8y ago

hn_throwaway_998y ago

It's just a matter of statistics, not that resistance-granting mutations naturally make the virus more susceptible to other drugs.

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