Mosquitos transmit and incubate malaria. You don't get malaria from hanging out with a person with it, you get it from getting bit by a mosquito that has previously bitten a person with malaria. [0] Given that the two are intrinsically related, it makes little difference when having a shallow discussion to make the distinction.
[0]https://healthclinics.superdrug.com/is-malaria-contagious/