https://www.who.int/vietnam/news/det...ce-in-viet-nam
Std risks are higher with commercial sex. Had a chat with a doctor previously. He advised against having BBBJ from Vietnamese ladies. There is a antibiotics abuse culture in Vietnam. As a result, the stds they transmit are more resistant to medicine. Meaning harder to cure.
Eating doxycycline over long term may also result in harder to cure std infections in future. Plus this medicine cannot be taken consistently for more than 4 months in a shot