Mosquitoes carry a type of Plasmodium, and after these parasites reproduce, they produce infectious sporozoites. When a mosquito carrying sporozoites bites a person to draw blood, the sporozoites enter the human body and infect red blood cells, making those with weaker immune systems easily susceptible to malaria.
In The Apocalypse, the mosquitoes' ability to transmit viruses was even greater. They didn't need to bite; merely inhaling the dust they shed could cause illness, which was more severe and harder to cure than the ancient diseases of persistent fever, vomiting, and dysentery.
This was also one reason why Bai Junjun hated mosquito disasters.
How could such tiny mosquitoes carry even tinier parasites in their stomachs?
Although Old Uncle Qiu could not understand these principles, when he thought about it carefully, it indeed seemed to make sense.