Whether they bite, sting or swarm ... They transmit diseases like malaria, dengue fever and Zika virus by feeding on human blood. Infected mosquitoes pass these pathogens into the bloodstream, leading ...

Then, in October 2023, an email came from the Pasadena Public Health Department: A person in the city had contracted California’s first-known case of dengue from a local mosquito. “When it happens in ...