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

Smoking damages the respiratory system by inhalation of a foreign substance, that is absorbed and residue is left behind on our lungs sponge like substance. the gas that is inhaled also increase your blood pressure and dilates your blood vessels. also the process of inhaling and exhaling the smoke it causes irritation to the throat and mouth. smoking can cause lung cancer and other respiratory and circulatory diseases. 

An advantage of an mri over ct scan is d. it produces better images of hard tissues. hope this : )