"Kamala Harris said that she'd happily take a [hypothetical] vaccine that doctors and scientists recommend — but absolutely not one touted by Donald Trump"

That's a far cry from what you said. She's not referring to an actual "Trump vaccine", as that didn't exist. She's saying that if Trump recommended something and scientists didn't - as was the case for hydroxycholoroquine, for example - then she would quite reasonably avoid it. Trump didn't recommend vaccination until March this year, by the way - long after scientists had weighed in, the first vaccines had been rolled out, Trump himself had been vaccinated, and he was no longer president.

>"If the public health professionals, if Dr. Fauci, if the doctors tell us that we should take it, I'll be the first in line to take it, absolutely. But if Donald Trump tells us that we should take it, I'm not taking it," Harris said.

and the second one's video byline says

>Senator Kamala Harris said during Wednesday's vice presidential debate that she will only follow instructions from health experts on whether to take a coronavirus vaccine, not President Trump.

and the third one says

>"I will say that I would not trust Donald Trump and it would have to be a credible source of information that talks about the efficacy and the reliability of whatever he's talking about," she continued in the clip from an exclusive interview airing Sunday on CNN's "State of the Union" at 9 a.m. ET. "I will not take his word for it."

I'm no spin-doctor, but I don't think that's a sick burn against the grandparent comment, which suggests that

>>[t]he only people who think Trump was involved in vaccine development are Trump himself and his supporters.

Harris actually said that Trump's endorsement, without accompaniment by actual medical professionals, wouldn't convince her. You chose those articles, and that is what those articles you linked to said. Again, strawmen say whatever you want them to.