But...
Malaria can be detected by modern hematology automated analyzers. I'm talking about ordinary hematology analyzers, not the ones specialized for malaria. All hospitals do at least one CBC+DIFF for all patients. If anyone cares to look at the warning flags and scattergrams [1], they could have seen that something's wrong, do a blood smear and confirm malaria in 30 minutes. It is a bit difficult, to be honest. Only a lab doc/tech would know how to interpret a scattergram, and some of the flags are extremely unreliable (not iRBC), but that doesn't mean they can be simply ignored.
Unfortunately, in most labs, doctors who check and validate results, do that from the lab software app, not directly from the analyzer, and - devs, take notes! - most hospital/laboratory software I saw (and I saw many) ignore all flags and graphics send by the analyzers. They just take the numbers and that's it. When doctors look at a report, they don't see flags or scattergrams, just the numbers. Can't even tell if the numbers are reliable or not. And this is how malaria diagnosis, and lots of others, are missed.