True, but to be fair if it were mosquitos alone, they would be little more than an annoyance. They're only deadly because they've teamed up with a host of other microorganisms like the Dengue, Zika, and Chikungunya viruses.
There was a documentary about mosquitos where a guy from the Australian Army said, that sleeping a night, with a lot of mosquitos -without protection- , could be your last night.