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Comment by andrewflnr | Hacker News Reader

> an antibody to a correct-handed antigen would not automatically bind the mirror

I wouldn't expect it to, but rather I'd expect the immune system to learn the new antigen just like it learned the old one.

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Unfortunately, seems the only way to figure this out is by testing. But on the flip, nobody can really trust that it won't accidentally or purposefully escape from labs.

Thus we can conclude military will make them. And they will escape.

We really can't. Militaries in particular aren't into bioweapons. Too hard to aim. They're pretty much strictly the domain of terrorists, and terrorists don't have the resources to execute attacks on the bleeding edge of biotech.

Remember, no one has built a regular cell from scratch, much less come close to building a mirror cell.

Military labs do work with bioweapons, and (unsurprisingly) they sometimes have trouble containing them just like regular labs.

E.g.

https://en.wikipedia.org/wiki/1971_Aral_smallpox_incident

https://www.fredericknewspost.com/archives/what-went-wrong/a...

https://www.nytimes.com/2004/05/25/world/russian-scientist-d...

https://www.usatoday.com/story/news/nation/2015/07/23/army-a...

For defensive purposes, FWIW. I suppose they might create some mirror molecules to test defenses, but I believe gus_massa's point stands that you don't need to generate full, functioning cells for that purpose.

They can create a few mirrored proteins and sugars and test them. Without RNA (and a lot of additional machinery) the proteins and sugars will not start to spontaneusly reproduce to conquer the word.

A prion don't have RNA, and yet they can reproduce

They can "reproduce" only in very specific environmens where there are similar non-malformed proteins nearby. It would be very hard to have a similar problem with a mirrored molecule that picks one type of normal molecules and mirror them.

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