Final answer:
Not all STIs are curable. Bacterial STIs can usually be cured with antibiotics, but viral STIs cannot be cured and require lifelong management.
Step-by-step explanation:
Not all STIs are curable. While some STIs can be cured with medication, others cannot be cured and can only be managed through treatment. Bacterial STIs, such as chlamydia and gonorrhea, can generally be cured with antibiotics. However, viral STIs, such as genital herpes and HIV, cannot be cured and often require lifelong management.