> The case remains under investigation, but it appears that someone became infected with the dengue virus, returned home and was bitten by a mosquito that passed it on to the local resident, according to Pasadena health officials.
It seems part of the common pattern for outbreaks of dengue viral infections in other urban centres. However California lacks a non-human primate reservoir would probably limit the risk of it becoming endemic.
There have been cases in other states too over the last 10 years. Florida, Texas and Arizona had a lot more locally acquired cases. Those might have been the first locally acquired cases in California. Maybe with climate change, as it gets warmer it becomes more prevalent.
https://abcnews.go.com/Health/wireStory/california-officials...
It seems part of the common pattern for outbreaks of dengue viral infections in other urban centres. However California lacks a non-human primate reservoir would probably limit the risk of it becoming endemic.