Lyme disease vs HIV/AIDS: Causes, spread & core differences

Lyme disease and HIV/AIDS aren't the same thing - they're totally different infections. Lyme comes from Borrelia bacteria transmitted by tick bites, while HIV is a virus that attacks the immune system. As Dr. Shikha explains, Lyme can cause rash, fatigue and joint pain, and HIV gradually weakens your immune defences if untreated.