I was listening to this live when he said it and have listened to recording several times since.

Most transcriptions are taken from one of the original ones rather than redo the work of it.

I’ll be damned, but I hear 'ingest' every time rather than 'inject’. Some of those early transcripts also had ingest.

Regardless of what he actually did say, it seems clear some people are hearing ingest and some inject. I mean, the man talks like a drunk 3 pints ahead of everyone else. What are you gonna do?

When he was confronted for clarification by a reporter, he missed that they asking him to clean up that comment and apparently thought they didn’t know what a disinfectant was. So he said something on the order of, “you know, a disinfectant. Like bleach.” He was talking over the reporter.

So that’s where the TRUMP ADVISES PEOPLE TO DRINK BLEACH TO CURE COVID headline came from.