Indeed. Of course, that isn't to say American pharmaceutical companies won't supply medicines or equipment to Britain as part of government purchasing systems.
But no party is going to sell off the NHS, or chunks of the NHS, to American providers. That is political suicide.
In spite of media story-telling, Boris Johnson is not a part of Trump's clique, nor is he Trump-lite. He is not one bit stupid. The buffoonery is undoubtedly a veneer.