Final answer:
The main symptoms of acute HIV infection may include fever, weight loss, sores, malaise, lymphadenopathy, rash, nausea, thrush, myalgia, and spleen enlargement. These symptoms occur within 2-4 weeks after infection and can last for a few weeks.
Step-by-step explanation:
Acute HIV infection may cause no noticeable symptoms, or it may cause a brief period of flu-like illness. The main symptoms of acute HIV infection include fever, weight loss, sores, malaise, lymphadenopathy, rash, nausea, thrush, myalgia, and spleen enlargement. These symptoms typically occur within 2-4 weeks after infection and can last for a few weeks.
Therefore, the correct answer is None (A). While respiratory and gastrointestinal infections, as well as neurological disorders, can occur in individuals with advanced HIV infection (AIDS stage), they are not indicative of recent HIV infection within 12 weeks after exposure.