What are the immediate effects of sexually transmitted infections?

There are none.: The scary part is, there are no "immediate" symptoms which is one of the reasons diseases can be spread unknowingly and damge can occir to the patient. Sometimes, it may take days or even months before people develop symptoms/effects. For women, early (not immediate) symptoms include vaginal discharge, pelvic pain, low-grade fevers, urinary symptoms and pain during sex. Infertility is possible.