These people didn't die from taking something Trump mentioned in a news conference. They took something they had at home for use in fish tanks that has a similar name.
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It does not appear they took the pharmaceutical version of the drug, but rather "an additive commonly used at aquariums to clean fish tanks," Banner Health said in a statement.
...
"I had (the substance) in the house because I used to have koi fish," she told the network. "I saw it sitting on the back shelf and thought, 'Hey, isn't that the stuff they're talking about on TV?'"
CNN eventually updated this story at the link Mama provided. But remember when this story first hit and most news orgs got it right the first time. I'm sure CNN got some clicks out of it though.