We are just a few years away from a safe and effective chlamydia vaccine. Chlamydia is the most common STI and also responds to antibiotics, although antibiotic resistant strains are developing.
It adds HPV for which there is also a vaccine that is having a big impact, which is also a very common sexually transmitted infections (STIs), in part, because it is often not symptomatic for long periods of time, but can cause genital warts and cervical cancer. And, there is a vaccination against Hepatitis B, a less common viral STI that affects the liver.
There is no vaccine or antibiotic treatments for the common viral STI genital herpes. There is also no vaccine for the common STI gonorrhea, but since it is bacteria it can be treated with antibiotics.
Two other, less common, STIs are syphilis and HIV/AIDs, both of which are viral. Syphilis is serious and hard to treat, HIV is deadly if untreated and there are only two cases of cures in history (both recently, however) and serious progress has been made on HIV vaccines although none of been truly reliably preventative although they do reduce the risk of infection. Also, while HIV PrEP is not a vaccine, taken in advance on a regular basis, it can prevent infection.
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