Health experts have a number of theories as to why all these STDs are on the rise.
Chlamydia can infect men and women and is transmitted by having vaginal, oral, or anal sex.
Klausner placed much of the blame for the overall STD spike on what he called the "decimation" of public health infrastructure since the 2008 financial crisis.
Chlamydia can damage the female reproductive system, reducing or completely blocking their ability to get pregnant in the future.
How many cases were reported?
Those most commonly affected by chlamydia and gonorrhea are under 30 years old.
"So in San Francisco, we recommend young women 25 and under get screened for chlamydia and gonorrhea every year with their provider. Seeing it come back like this is a sign of failure of the public health safety net", Dr. Jeffery Klausner, a professor of medicine of the University of California, Los Angeles, told the Associated Press.
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Gonorrhea is a very common infection, especially among young people ages 15-24. Discharge, bleeding between periods, swollen testicles are some of the symptoms of gonorrhea.
The 218,710 cases of chlamydia reported in 2017 was the highest number since records were first kept on the disease in 1990. So whether or not you find the billboards with microscopic images posted in Oakland, Los Angeles, and all the way out to Florida, save yourself and future sexual partners a potentially untreatable case of gonorrhea by getting tested.
Syphilis can cause permanent loss of vision, hearing and other neurological problems.
Officials are particularly concerned by mothers infected with syphilis, which has led to a significant increase in the number of stillborn babies. This represents an average infection rate of 34.3 cases per 100,000 Californians, higher than the national average of 8.7 per 100,000.
California tragically reported a three-fold increase in stillbirths from congenital syphilis, with 30 occurring in 2017. African-Americans had early-syphilis rates two-times higher than whites.
The CDPH expressed plans to collaborate with local health departments and organizations in order to raise awareness about regular testing, safe sex practices, risks and treatment options, etc.