Someone who is hiv? positive might initially experience flu? like symptoms, followed by a period of time with no obvious symptoms. the seriousness of the disease becomes apparent only after more severe symptoms develop. what other sti has a similar pattern of symptomology?

HIV has no apparent symptoms for the first 10-15 years. Flu isn't a symptom of HIV the apparent symptoms will be developed further on. 

People may experience:Pain areas: in the abdomenPain circumstances: can occur while swallowingCough: can be dryWhole body: fatigue, fever, loss of appetite, malaise, night sweats, or sweatingGastrointestinal: nausea, persistent diarrhea, vomiting, or watery diarrheaMouth: ulcers or white tongueGroin: sores or swellingThroat: difficulty swallowing or sorenessAlso common: opportunistic infection, headache, oral thrush, pneumonia, red blotches, severe unintentional weight loss, skin rash, or swollen lymph nodes