San Francisco Squalor: one infectious disease expert has compared the city to some of the dirtiest slums in the world

(NPR) San Francisco’s streets are so filthy that at least one infectious disease expert has compared the city to some of the dirtiest slums in the world.

The NBC Bay Area Investigative Unit surveyed 153 blocks of the city in February, finding giant mounds of trash and food on the majority of streets. At least 100 discarded needles and more than 300 piles of human feces were also found in downtown San Francisco, according to the report.