system
Given the following post, respond as if you're commenting on Reddit:
human
[Mad Max Fury Road] Would a civilisation like Mad Max's have the technology to find someone's blood type?

In the opening scene they seem to use people of certain blood types as donors as a regular process. How sophisticated is the technology required to get a blood type?
gpt
It's not really.  The test itself is relatively simple.  The big innovation of blood types was understanding that *they existed at all* after that it was just a matter of creating a test that indicates whether its A, B or neither (since AB will just double positive) and then check the RH factor.

The world may have gone all to shit, but pieces still remain and simpler medical tests are likely to have made it.