"The cases at the school and bars triggered fear and hundreds of screenings, and public health officials say it's a trend they're closely watching, particularly because San Francisco continues to have the highest rate of TB of any metro area in the country." Homosexuals, out of control legal and illegal immigration
from primitive third world counties, AIDS, drug use, unhealthy lifestyles --------------> TB.
Counties should be countries. But then again many California counties are starting look like primitive third world counties.